Helppp ASAPThe overall charge of a formula unit for an ionic compound . Group of answer choices

A. is always zero (neutral)

B. it is always positive

C. is always negative

D. it may have any value

onic compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero

Explanation:

Thats what I found when I looked it up but I didnt know what answer choice to pick out of that so Ill let you do it

A. is always zero

Explanation:

In all cases the charge on the sum of the anions is equal to the charge on the sum of the cations, to give a neutral salt

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.