A certain element forms an ion with 18 electrons and a charge of +2. What is the element?

1 Answer
Mar 10, 2017

Answer:

calcium (Ca).

Explanation:

A certain element forms an ion with 18 electrons and a charge of +2. ... Recall that atoms have the same number of electrons as protons, and the atomic number of an atom is the number of protons it has. So, the atom in question is the atom whose atomic number is 20.....that's calcium (Ca).