Question

What is the identity of element Q if the ion `Q^(2+)` contains 10 electrons?

Answer 1

Got a Periodic Table............?

Explanation:

You know that mass and charge are conserved in chemical reactions. And you have performed an oxidation reaction which we can represent in this way:

`Q+DeltararrQ^(2+)+2e^-`

So `Q`, and `Q^(2+)` MUST HAVE 12 positive charges in their nuclei? Why `"must"`?

If `Z=12`, then as what metal does the Periodic Table identify the element? It begins with a `"M"`............