Question

How many electrons does a calcium atom have and how many does oxygen atom on its outer shell?

Answer 1

Answer:

Calcium has 20 electrons

Oxygen has 6 Electrons in their outermost shell

Answer 2

Explanation: Calcium, Ca , is located in group 2 of the periodic table, which means that is has two electrons on its outermost shell. In order to have a complete octet, calcium must lose these two outermost electrons, also called valence electrons. Calcium will react with nonmetals to form ionic compounds.