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

2 Answers
Dec 9, 2015

Answer:

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

Answer:

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.