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

Mar 18, 2017

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:

$Q + \Delta \rightarrow {Q}^{2 +} + 2 {e}^{-}$

So $Q$, and ${Q}^{2 +}$ MUST HAVE 12 positive charges in their nuclei? Why $\text{must}$?

If $Z = 12$, then as what metal does the Periodic Table identify the element? It begins with a $\text{M}$............