In calcium chloride, there are two Cl - anions per Ca 2+ cation, so the empirical formula for calcium chloride is CaCl 2 . Since the potential of the reference electrode is constant, it is the potential developed at the indicator electrode that contains information about the amount of analyte in a sample. 11. If the element has more than one possible charge, the value of the charge comes after the element name and before the word ion. National Institutes of Health. Try refreshing the page, or contact customer support. We found that nanopores with diameters smaller than 20 nm were blocked by calcium ions such that the ion currents in mixtures of KCl and CaCl 2 and . Calcium is an electrolyte, which means it has a positive charge when it's dissolved in water. Uses Calcium metal is used as a reducing agent in preparing other metals such as thorium and uranium. X\ Question: LAB REPORT SHEET Compounds and Their Bonds 9 A. Ions: Transfer of Electrons Element Atomi1. I feel like its a lifeline. This page titled Ion-Selective Electrodes is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Contributor. 2 0 obj Hydroxide Ion Overview & Formula | How are Hydroxide Ions Formed? 22 chapters | Save my name, email, and website in this browser for the next time I comment. endobj Note that only one polyatomic ion in this Table, the ammonium ion (NH4+1), is a cation. Initially, researchers attempted to use glass membrane electrodes (which had been successful for monovalent cations such as H+ and Na+) to detect divalent cations, such as Ca2+. It is composed of Ca 2+ cations and Cl - anions; those ions are stable since they have filled valence shells. Calcium compounds are widely used. In reality, ion-selective electrodes can experience interferences by responding to the presence of other ions. On the Periodic Table metals (found on the left of the table) will be positive. Ca - 2e - Ca 2+ Here, the electron configuration of calcium ion(Ca 2+) is 1s 2 2s 2 2p 6 3s 2 3p 6. Calcium is located in group 2 on the periodic table, which means its outer shell, called the valence shell, will contain 2 electrons. Polycrystalline or mixed crystal membranes such as AgCl / Ag. Enrolling in a course lets you earn progress by passing quizzes and exams. Calcium dialkyl phosphate complex. In addition, calcium ion presents the smallest polarization strength of 10.4 (vs. 14.7 for magnesium ion, 16 for zinc ion, and 24 for aluminum ion) 10, suggesting comparatively fast mobility of . By having calcium nutrients absorbed by plants through the root system, plants are more likely to have healthy growth. How many molecules are there in one mole of calcium ions? This positive calcium ion(Ca 2+) has twenty . Although it is convenient to think that \(\ce{NaCl}\) crystals are composed of individual \(\ce{NaCl}\) units, Figure \(\PageIndex{1}\) shows that no single ion is exclusively associated with any other single ion. In this case, the calcium atom carries a positive charge. Selectivity coefficients for some of the electrodes previously discussed are listed below. There are far more hydrogen carbonate ions (\(\ce{HCO3^{}}\)) in blood than in seawater. Human Anatomy & Physiology: Help and Review, Biochemistry in Anatomy and Physiology: Help and Review, Psychological Research & Experimental Design, All Teacher Certification Test Prep Courses, Inorganic Chemistry in Anatomy and Physiology: Help and Review, Organic Molecules in Anatomy and Physiology: Help and Review, Biochemical Reactions: Synthesis and Decomposition, Function of Enzymes: Substrate, Active Site & Activation Energy, Coenzymes, Cofactors & Prosthetic Groups: Function and Interactions, Enzymatic Reactions: Inhibition and Regulation, Redox Reactions & Electron Carriers in Cellular Respiration: Definitions and Examples, Cellular Respiration: Energy Transfer in Cells, Glycolysis Pathway: Steps, Products & Importance, Lactic Acid & Alcoholic Fermentation: Comparison, Contrast & Examples, The Citric Acid (Krebs) Cycle: Products and Steps, The Electron Transport Chain: Products and Steps, Human Growth Hormones: Uses & Side Effects, Synthesis Reaction: Definition, Formula & Examples, Tetramer: Definition, Analysis & Immunology, Biotransformation of Drugs: Definition, Types & Process, Gluconeogenesis: Definition, Steps & Pathway, What Are Antioxidants? They rely so much on it, that it is actually the most abundant mineral present. Therefore, \(\ce{OF2}\) is not ionic. Specific charge=Electrical chargeParticle mass=4.79701x107C/kg. By convention, the lowest whole number ratio is used in the formulas of ionic compounds. The number of protons and neutrons in the nucleus. 8. Chase is a 14 year veteran science teacher with a specialization is chemistry/STEM. Its 100% free. Also note that this combination of nitrogen and oxygen has no electric charge specified, so it is not the nitrite ion. Potassium ions have a charge of 1+, while sulfate ions have a charge of 2. Calcium in plants is used for healthier cell walls and membranes at the cellular level. The optimal storage temperature for many Li-ion chemistries is between 10 and 25 C. This chemical formula says that there are one magnesium ion and two chloride ions in this formula. Rather, it exists as two individual chloride ions.) ion charge: +2: 99 pm. In contrast, the compound NO2 contains two elements that are both nonmetals (nitrogen, from group 5A, and oxygen, from group 6A). Possibly even more important than the role calcium plays in muscle function, it is also needed in order for blood to coagulate or clot in the human body as well. Calcium works together with phosphate ions to produce a chemical known as hydroxyapatite. He has a Bachelors Degree in Chemistry and a Master's Degree in Instructional Media with a specialization in STEM. As with the ion-exchange process, equilibrium is established at both solution-membrane interfaces. You need to divide an atoms electrical charge by its mass. 15. Over 10 million students from across the world are already learning smarter. For each pair of elements, determine the charge for their ions and write the proper formula for the resulting ionic compound between them. The resulting charge separation at each interface leads to a phase-boundary potential. Calcium not only plays a role famously in the composition of bones and teeth, but it is also a vital element in the communication throughout the body known as neurotransmitters. Ions with higher charge are more effective than ions with lower charge at this shielding effect. Electrochemical cell for a potentiometric measurement with an ISE. Because these ions contain more than one atom, they are called polyatomic ions. 2) Ionized or free calcium is the physiologically active form that accounts for 50%-60% . Specific charge is 9.58 10 7 C k g 1. Some foods of course have more calcium in them than others. c. activates myosin kinase in smooth muscle contraction. In sodium chloride, there is one Na+ cation per each Cl-, so the formula unit for sodium chloride isis NaCl. Because it only has 2 valence electrons, calcium is classified as a metal on the periodic table. Write the chemical formula for a simple ionic compound. An electrochemical cell for making a potentiometric measurement with a membrane electrode (also known as an ion-selective electrode, ISE) is shown in Figure 1. Click to reveal answer A calcium ion is formed by removing two electrons from an atom of 4020Ca . Calcium is a silvery-white, soft metal that tarnishes rapidly in air and reacts with water. . Unfortunately, much like the common system for naming transition metals, these suffixes only indicate the relative number of oxygens that are contained within the polyatomic ions. The magnitude of the electrical charge of both electrons and protons is the same, but that of electrons is negative. Calcium-selective ion exchange resin (Amberlite IRC747) was purchased from Dow Chemical, USA. This simplifies to its correct empirical formula MgO. The periodic table is. Now that we have developed an electrical potential across the membrane, we need to find a way to measure it. What potential (mV) reading do you expect for the last solution. However, we can use the ratio of sodium ions to chloride ions, expressed in the lowest possible whole numbers, as a way of describing the compound. The formulaunit or empirical formula represents the minimum proportion between cations and anions in the crystal lattice. An ion (/ a. 12. If more than one of a particular polyatomic ion is needed to balance the charge, the entire formula for the polyatomic ion must be enclosed in parentheses, and the numerical subscript is placed outside the parentheses. of the users don't pass the Specific Charge quiz! Charge of a proton or electron, e = 1.60 10 -19 C; Mass of a proton, m p (or neutron, m n) = 1.67 10 -27 kg; To calculate the specific charge of an ion: Charge = Total number of electrons added / removed (1.60 10 -19 C) In order to construct an ion-selective electrode, we would add an inner reference solution to the other side of the membrane. We and our partners use cookies to Store and/or access information on a device. This combination is written as \(\ce{AlF3}\). high oxide ion conductivity, oxidation states, and favorable thermal and chemical . Two examples are shown below: There are two ways to recognize ionic compounds. endstream % It is this potential difference across the LaF3 crystal membrane that is measured and related to F- concentration. The aim of this work is the study of the effect of electromagnetic radiations (ELF-EMF) tuned to the calcium cyclotron resonance condition of 7.0 Hz, 9.2 T on the differentiation process of pituitary corticotrope-derived AtT20 D16V cells. CV analyzes the electrochemical characteristics and charge storage mechanism of calcium tungstate and dysprosium (0.8%) doped . M Ionic Charges of All Elements (List + Images inside) Ionic Charges of All Elements (List) Ionic charge: When the atom loses or gains one or more electrons, the electric charge is generated (and an ion is formed). There are three main types of membranes. Second, if you recognize the formula of a polyatomic ion in a compound, the compound is ionic. Doctors define hypocalcemia, or a calcium deficiency, as blood calcium concentrations of below 8.8 milligrams per deciliter. Out of the 118 elements on the periodic table, there are few as valuable to humans as calcium. All rights reserved. Ionic compounds exist as alternating positive and negative ions in regular, three-dimensional arrays called crystals (Figure \(\PageIndex{1}\)). Everything you need for your studies in one place. For example, a kij value of 0.01 means that the electrode is 100 times more responsive to ion i over j. Selectivity coefficients can be experimentally determined. Neurotransmitters can either have excitatory or inhibitory effects on the postsynaptic membrane, as detailed in Table 16.2 . The membrane must have low solubility in the analyte solution we dont want it to dissolve!! Because everyone is different, sometimes you may have a result that falls outside the reference range. Two sodium 1+ ions are needed to balance the 2 charge on the sulfur ion. It is not an ionic compound; it belongs to the category of covalent compounds discuss elsewhere. Potassium flow also decreases. Press question mark to learn the rest of the keyboard shortcuts. Where to find grade boundaries for BPhO Intermediate? What would the total charge be? The specific charge of an atom is the ratio of its electrical charge to its mass. e. is a byproduct of glycolysis. Single crystal LaF3 is widely used to determine F-. 761 lessons. Figure 4 shows the chemical structure of two ionophores. Aluminum Oxide Formula & Charge | Is Al2O3 Ionic or Covalent? Thus, the formula for this ionic compound is \(\ce{Fe2O3}\). Free and expert-verified textbook solutions. An example of data being processed may be a unique identifier stored in a cookie. The overall charge of the ion is -2 in relative units or 2 x 1.6 x 10-16 C The mass of the nucleus of the ion is 16 x 1.7 x 10-27.kg The combined mass of the electrons is so small it is insignificant in this calculation. The electrons from the Ca are now with the two Cl atoms.----- Helpful Videos -----Finding the Charge on Ion: https://youtu.be/N4N1Njh7nCoIntroduction to Writing Electron Configurations: https://youtu.be/J-v9_ieCqJIHow to Draw Lewis Structures: https://youtu.be/1ZlnzyHahvoFormal Charge Practice Video: https://youtu.be/-9f4H0puVzcFinding Valence Electrons (element): https://youtu.be/x1gdfkvkPTkFor more help with chemistry visit www.Breslyn.org $ I R 8 The resulting charge separation at each interface results in a phase-boundary potential.8-10 If the analyte ion concentration on each side of the membrane was equal, the potential difference across the membrane would be zero. The consent submitted will only be used for data processing originating from this website. See how this Interactive Periodic Table helps you. In this lesson, learn about the calcium ion charge and find the calcium ion formula. Write the chemical formula for the ionic compound formed by each pair of ions. A fluoride ISE gives the following calibration data. The three main components of making a measurement at an ISE are an inner reference, or standard, solution and an outer analyte, or sample, solution separated by a thin membrane. Manage Settings The potential developed at the membrane is the result of either an ion exchange process or an ion transport process occurring at each interface between the membrane and solution. Nanopores in 15 nm thick silicon nitride films were drilled using focused ion beam and e-beam in a transmission electron microscope and subsequently rendered negatively charged through silanization. What information does the nuclide notation provide? tofu. Calcium ion | Ca+2 | CID 271 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. xTA 6. Example 4.4-2 Write the formula for the simplest binary ionic compound formed from each ion or element pair. As shown in Figure 1, a reference electrode is placed in the inner solution and a second reference electrode is in contact with the analyte (outer) solution. The formula \(\ce{Mg2Cl4}\) has balanced charges with the ions in a 1:2 ratio, but it is not the lowest whole number ratio. This solution would contain a fixed concentration of the ion of interest, Li+ in this example. a specific intramembranous charge movement (charge 2; Brum and Ros, 1987) generated by conformational . Set individual study goals and earn points reaching them. Chemical structures of a crown ether (left) and of valinomycin (right), two ionophores. What is the number of protons in a helium nucleus (alpha particle)? Ga 3+ and As 3- Eu 3+ and O 2- calcium and chlorine Given: ions or elements Each ion is surrounded by ions of opposite charge. The Student Room and The Uni Guide are both part of The Student Room Group. The recommended dietary allowance of calcium for adults aged 19-50 is . Muscle contraction in animals is a direct result of the presence of calcium in the neurotransmitters. Self-discharge in Li-ion batteries cannot be eliminated, but it can be managed. Here are some of the most calcium-rich foods: Humans are certainly not the only living beings that use the existence of calcium to their advantage, however. For example, if you see the formula \(\ce{Ba(NO3)2}\), you may recognize the NO3 part as the nitrate ion, \(\rm{NO_3^}\). We do not use 1 as a subscript. In contrast, seawater is principally a 3% sodium chloride solution, over three times the concentration in blood. d. is an oxygen storage molecule. Continue onto the next page to work on some problems about ISEs. Calcium plays a key role in quite a few of your body's functions. The aluminum ion has a 3+ charge, while the fluoride ion formed by fluorine has a 1 charge. This makes it an ion. To unlock this lesson you must be a Study.com Member. %PDF-1.4 As before, we put an internal reference electrode in the internal reference solution and an external reference electrode in the analyte solution, as shown in Figure 5. Nearly 99% of all of a human's calcium can be found stored inside of their bones. Note that all of the polyatomic ions whose names end in "-ate" contain one more oxygen than those polyatomic anions whose names end in "-ite." We can simply find the charge by summation of charges of each atom / molecule used to form the compound. milk. Write the chemical formula for the ionic compound formed by each pair of ions. Textbook 1 Example 2: An ion of the magnesium isotope has a 12 protons and 12 neutrons. 2. Although both of these ions have higher charges than the ions in lithium bromide, they still balance each other in a one-to-one ratio. This would mean that calcium has lost its 2 valence electrons and has 2 more protons than electrons. According to the supplier, it contains aminophosphonic groups in a poly (styrene-co-divinylbenzene) matrix, and has a mean diameter of 0.59 0.07 mm and total ion exchange capacity of 1.75 eq/L. Table \(\PageIndex{1}\): Some Polyatomic Ions. With the exchanger or ionophore present, the processes described in Figures 2 and 3 transport the ion into the membrane. <>stream Although the fluoride electrode comes close, no membrane is 100% specific for only one ion. = . Each ion is surrounded by ions of opposite charge. What is the charge of one calcium ion (in elementary charges and/or couloms)? The formula for an ionic compound follows several conventions. Click here to learn more. To put this in perspective, if an electrode has equivalent responses to the two ions, then kij = 1.0. During the formation of a bond, calcium donates two electrons of the last shell to form bonds and turns into a calcium ion(Ca 2+). An action potential is a rapid sequence of changes in the voltage across a membrane. Calcium has a positive 2 charge when it is in its ion form. 5. This electrode works by an ion-exchange process. Some ions consist of groups of atoms covalently bonded together and have an overall electric charge. The specific charge of the ion formed is 8.57 105 C kg-1. The formula for nitrate must be enclosed in parentheses. Here, we report oxide structures containing big open spaces (heptagonal and hexagonal channels) as a prospective solution. This would mean that calcium has lost its 2 valence electrons and has 2 more protons than electrons. Legal. Only one ion of each is needed to balance these charges. Each entry has a full citation identifying its source. Figure \(\PageIndex{2}\) lists the most common polyatomic ions. You will also get the HD images of the Periodic table (for FREE). Write the chemical formula for the ionic compound formed by each pair of ions. > @ X bjbj$$ . The potential measured, Emeas, is the potential difference between the analyte (Eouter) side of the membrane and the reference (Einner) side of the membrane: \[E_{meas} = E_\ce{outer} - E_\ce{inner} \tag{1}\]. The cell consists of both an indicator and reference electrode. To find the ionic charge of an element you'll need to consult your Periodic Table. Through the help of calcium, neurotransmitters can do their jobs efficiently. Sodium will lose its two valence electrons to another atom to make its most stable form. The electron-rich center of valinomycin efficiently extracts K, Relationship Between Potential and Concentration, status page at https://status.libretexts.org. 0?> PBMVU4VJdgbLp),=yShhVfYtjG1@UI{"BT$U]Z[b_d)tNzwlzZ2|@K(P\[XZg"8{;M47` f#Gsq]CNoB /N2!*@ll^7B j The \(\ce{NH4}\) in the formula represents the ammonium ion, \(\ce{NH4^{+}}\), which indicates that this compound is ionic. Figure 5. 806 8067 22 Registered Office: Imperial House, 2nd Floor, 40-42 Queens Road, Brighton, East Sussex, BN1 3XB, Taking a break or withdrawing from your course, PSHE teacher told us that watching porn is ok and healthy, Official University of Edinburgh 2023 Applicant Thread, Oxford History Applicants 2023 - Undergraduate & Postgraduate, Fundamentals of Nursing 9th Edition Textbook. Phase 0 is depolarization of the membrane and the opening of "fast" (i.e., high-flow) sodium channels. Is the charge of an ion different from 0? Here are some intermediate questions you might need to answer to figure this out. Because the cell has potassium channels through which K + can move in and out of the cell, K + diffuses down its chemical gradient (out of the cell) because its concentration is much higher inside the cell than outside. The outer lipophilic part of the valinomycin molecule allows it to remain in the polymeric membrane. The following are good sources: yogurt. Calcium ions have a charge of 2+, while nitrate ions have a charge of 1. What is the specific charge Press J to jump to the feed. Note that the const term contains Einner and the E0 from the Eouter term. This is to show that the subscript applies to the entire polyatomic ion. We're here for you! Two chloride ions were needed in the final compound because calcium had a 2+ charge. Calcium as a nutrient is most commonly associated with the formation and metabolism of bone. Recognize polyatomic ions in chemical formulas. We have carried out a systematic study by measuring protein-protein interactions for a monoclonal antibody over an ionic strength range of 25 to 525 mM at 4 pH values (5, 6.5, 8, and 9) in solutions containing sodium chloride, calcium chloride, sodium sulfate, or sodium thiocyante. What is the specific charge of an electron? This new equation is called the Nikolskii-Eisenman equation: \[E_{meas} = const + \dfrac{0.05916}{z} \log(A_i + k_{ij} A_j^{\Large\frac{z_i}{z_j}}) \tag{5}\]. Iron can form two possible ions, but the ion with a 3+ charge is specified here. <>/Font<>>>/Rotate 0/Group<>/Contents 261 0 R >> The potential of each side is related to activity (A) or concentration as described by the Nernst equation, where z is the charge of the ion of interest: \[E_{outer} = E^o \dfrac{0.05916}{z} \log \dfrac{1}{A_{unk}} \tag{2}\], \[E_{inner} = E^o - \dfrac{0.05916}{z} \log \dfrac{1}{A_{ref}} \tag{3}\]. This electric charge generated on the ion is known as Ionic charge.When atoms gain electron/s, the negatively charged ion is formed, and when the atoms lose electron/s, the positively charged ion is formed. The membrane should also have low electronic conductivity. A goal of an ion is to gain or lose electrons which will lead it to have a full outer shell. StudySmarter is commited to creating, free, high quality explainations, opening education to all. Be perfectly prepared on time with an individual plan. 4 0 obj An error occurred trying to load this video. When crossing charges, it is sometimes necessary to reduce the subscripts to their simplest ratio to write the empirical formula. PubChem . Test your knowledge with gamified quizzes. Your body is always working to balance things out. Identify each compound as ionic or not ionic. 9. the ratio of each kind of ion in the compound, status page at https://status.libretexts.org. AQA A Level Physics Required Practical 2 Slit Experiment, Finding the unknown mass of a bedridden patient and the center of gravity 2 versions. Science has long recognized that blood and seawater have similar compositions. As has been repeatedly emphasized in several sections of this text, no two chemical formulas should share a common chemical name. Calcium is the fifth most abundant element in seawater and is very reactive by itself in nature. Over 99 percent of total body calcium is found as calcium hydroxyapatite (Ca10[PO4]6[OH]2) in bones and teeth, where it provides hard tissue with its strength. Figure 10.3.1 - Motor End-Plate and Innervation: At the NMJ, the axon terminal releases acetylcholine (ACh). 14. Using a simple, general trend for the ionic charge for elements on the Periodic Table, in this video we find the ionic charge for Calcium (Ca). endobj Assume that both the mass of a Now that you understand the basics of ion exchange, lets put a membrane, containing an ionophore, between an unknown analyte solution and a known reference solution (Figure 3). The findings indicate that MoVO provides one of the best performances reported to date for the storage of calcium ions. Storing the batteries in cool but dry conditions will reduce the rate of electrolyte breakdown. 1992) nor the ion flow through cardiac chan-nels influence inactivation of gating . x+r However, if the concentrations are not equal, a membrane potential will develop. Determining the atomic charge of calcium ion requires the information of its . The easiest way to balance these charges is to assume the presence of two chloride ions for each magnesium ion: Now the positive and negative charges are balanced. Electron c# Configuration of Atom 2. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. For compounds in which the ratio of ions is not as obvious, the subscripts in the formula can be obtained by crossing charges: use the absolute value of the charge on one ion as the subscript for the other ion. The oxygen atom has a 2 charge as an ion. Specific charge is the ratio of an atoms mass to its electrical charge. About 99% of the body's calcium is stored in bones, and the remaining 1% is found in blood, muscle, and other tissues. Calcium carbonate is a chemical compound with the chemical formula Ca CO 3.It is a common substance found in rocks as the minerals calcite and aragonite (most notably as limestone, which is a type of sedimentary rock consisting mainly of calcite) and is the main component of eggshells, gastropod shells, shellfish skeletons and pearls.Things containing much calcium carbonate or resembling it . This method is shown schematically in Figure 3.3.2. Humans will gather calcium in their bodies through normal food consumption, but eating these specific foods can help the body function at a higher level: Aside from humans, some animals are also heavily reliant on the presence of calcium in their bodies to produce hearty and full shells to protect from predators in the form of calcium carbonate. Inside of the body, calcium binds to the phospholipids in a cell and provides a surface for the assembly of various clotting factors. Specific Charge The specific charge of a particle is a ratio between the total charge and the total mass. . Copyright The Student Room 2023 all rights reserved. More specifically, the family of elements that calcium falls into is named the alkaline earth metals. Create beautiful notes faster than ever before. In addition to hydroxyapatite, calcium is also a key contributor to the receptors in the human body known as neurotransmitters. It is the notation that provides information about an atoms nucleus. While both the nitrate ion and the sulfate ion share an "-ate" suffix, the former contains three oxygens, but the latter contains four. sardines and salmon. They include calcium's ability to: 2 Help form bones and teeth Help maintain body strength Assist in the movement of muscles Assist with nerve messaging between the brain and body systems Help blood flow as vessels relax and constrict Unfortunately, the relative nature of these suffixes mandates that the ion formula/ion name combinations of the polyatomic ions must simply be memorized. Atomic Number - Protons, Electrons and Neutrons in Calcium. The ionic form of calcium is very useful to living things. Sodium is a metal, and oxygen is a nonmetal; therefore, \(\ce{Na2O}\) is expected to be ionic. This simplifies to its correct empirical formula PbO2. Moreover, calcium has a dual role in this process; it not only neutralizes the charge but also weakens the cell membrane to produce invaginations (Stein, 1990; Thomas and Rice, 2014). Table \(\PageIndex{2}\) lists the ion names and ion formulas of the most common polyatomic ions. So: specific charge = EMBED Equation.3 = EMBED Equation.3 = -1.2 x 10-7Ckg-1 % ) , A B U V W X Y Z m }gV}J j h=l CJ UaJ !j hQgQ h=l CJ EHUaJ +jIP Let me know which, if any of these questions you need help with. 8 4.3: Formulas for Ionic Compounds is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts. Have all your study materials in one place. Specific Charge- Calculated Examples The specific charge of a particle is its charge to mass ratio : Symbol for charge Q Symbol for mass m specific charge = EMBED Equation.3 example 1: Calculate the specific charge of the proton.