How do you solve for the number of electrons when only given the mass number and atomic number?

You need to know the charge on the atom or ion. The mass number is completely irrelevant if you have the atomic number The atomic number tells you the number of protons in the nucleus If the atom is neutral then it has as many protons as electrons, and so the number of electrons equals the atomic number If the atom is charged and is thus called an ion, than take the atomic number and subtract the charge from it to give the number of electrons For instance, if you have a sodium ion with charge +1 (Na ), then the number of protons is equal to 11 (the atomic number), and the number of electrons is 11 - 1 = 10 If instead you had a chlorine ion with charge -1 (Cl-), then the number of protons is equal to 17 (the atomic number), and the number of electrons is 17 - -1 = 18 See the Related Questions to the left for more information about how to count the particles of an atom.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.