Question

The formula of a salt is XCl2. The X-ion in this salt has 28 electrons. The metal X is A) Ni B) Zn C) Fe D) V

Answer 1

The answer is B) Zn

I hope this helped =)

Answer 2

 If the formula is XCl2, the X ion has a charge of +2 since each Cl ion has a charge of -1.  

Then if the X ion has 28 electrons with a charge of +2, it must have 30 protons.  

Its atomic number is 30, which makes it zinc. The metal X is Zn. Choice b is correct.