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You are watching: How many electrons does cobalt have

How numerous electrons are in 59 Co^(2+)27I don"t also understand this! can someone explain please!!
How numerous electrons room in 59 Co^(2+)27I don"t also understand this! can someone define please!!

27 is the atom number which represents the variety of protons and also the number of electrons. They room usually same to each other other than in this case. Co (2+) is a cation (an ion with a optimistic charge) and also the only method this can occur is if Co shed 2 electrons. Therefore the number of protons is 27 and the variety of electrons is 25.
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In general, if the atomic number is Z and also the fixed number is M, there room Z protons, M - Z neutrons, and M - C electrons, whereby C is the fee (+2 in this case).

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Here"s solution that usually repeats CRGreathouse"s and also Diehardwalnut"s answers, but with a bit much more explanation and how to read the symbols.Symbols for nuclides look favor this:\(\displaystyle ^A_ZX_N^charge\)where X = symbol telling you which element it is (like C because that carbon or He because that helium)A = massive number = total variety of protons and neutronsZ = atom number = total number of protonsN = total number of neutronscharge = net fee on an atom (in systems of e, the charge on one electron). If this is missing, the atom is neutral.The letters are simply swapped with numbers in a genuine nuclide, except X, which is simply a symbol Every element has the same variety of protons. Because that example, carbon will always have 6 protons. Due to the fact that of this, some human being leave out the Z.Also, if you know A, the total variety of protons and also neutrons, and Z, the total variety of protons (by looking up the element in the periodic table), then you can calculate the number of neutrons, N, simply by subtraction. For this reason most human being leave off the N too!As long as you have the chemistry symbol and the fixed number, you can uncover out whatever else. Since of this, it is common to see people talking about "carbon-12" or "nitrogen-14", where the number is the massive number.------------------------------------------------------------So... We have actually \(\displaystyle ^59Co^2+\)...A = 59. Therefore, there are 59 protons and neutrons.If girlfriend look up Cobalt on the regular table, it has actually an atomic variety of 27. So we know that there space 27 protons.This method we have 59 - 27 = 32 neutrons.Now for the electrons. In a neutral atom that cobalt, we would certainly have precisely the same number of electrons together protons. We have 27 protons, therefore a neutral atom the \(\displaystyle ^59Co\) would have 27 electrons.However, we have actually a fee of +2. Electrons have a negative charge, for this reason this means there space 2 under electrons than the neutral one. So... The number of electrons need to be 27 - 2 = 25.Quick inventory:number of protons = 27number of neutrons = 32number of electrons = 25Practise many these! The only way to gain clear around this is come practise with numerous them last note: If friend look at the periodic table, you"ll find that facets have decimal numbers because that the atomic mass number rather than whole numbers. A nuclide must have a whole number of neutrons, protons and also electrons, so this can be fairly puzzling. Basically, the decimal is the median mass number in a sample of that element.For example, if we look at a copper pipe, we"ll find that we actually have a mix of \(\displaystyle ^63Cu\) and \(\displaystyle ^65Cu\) atom in it. It transforms out the mixture is always much more or less the very same in every single sample and that over there is an ext \(\displaystyle ^63Cu\) than \(\displaystyle ^65Cu\), so the median mass number is 63.55.