# An anion with a net -2 charge has a total of 36 electrons. What element is the anion derived from?

Dec 9, 2015

If the net charge is $- 2$, there must be 34 positive particles in the nucleus, i.e. $Z$ $=$ $34$.

#### Explanation:

If $Z$ $=$ $34$, then the identity of the element is revealed. If only there were a Table that listed such data!

Dec 9, 2015

The element is selenium

#### Explanation:

Since its charge is -2 it means the atom gained 2 electrons from its reaction. Hence it would originally have 34 electrons and protons. To arrive at such a conclusion of selenium being the element simply consult the periodic table and find the element with atomic number being 34.