What is the chemical formula for the compound formed between strontium and oxygen?

SrO = Strontiumoxide

Explanation:

Strontium is an element part of group 2. This means it has 2 electrons on the outer shell. This gives Strontium a positve electronic charge of + 2.

Oxygen is an element, part of group 16. This means it has 6 electrons on the outer shell. To get the stable noble gas configuration, it needs 2 more electrons. This gives oxygen a negative electronic charge of - 2.

This means 1 strontium atom can bind to 1 oxygen atom. To form Strontiumoxide (SrO).