Molarity and Ion Concentrations: In a textbook it says molarity measures a molecular compound as it exists within the solution (Example: 1.0M C6H12O6 indicating that it contains 1.0 mol C6H12O6 per liter of solution). However, with an ionic compound it measures it before it dissolves (Example: 1.0M CaCl2 solution contains 1.0 mol Ca and 2.0 mol Cl). Why is it like this? Can’t glucose be broken down the exact same way (6 mol C, 12 mol H, 6 mol 6)?

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.