Question

how many atoms of oxygen (o) are in the compound: * calcium peroxide cao₂ 1 atom 2 atoms 3 atoms

Explanation:

Step1: Analyze the chemical formula

The chemical formula of calcium peroxide is \(CaO_{2}\).

Step2: Determine the number of oxygen atoms

In the formula \(CaO_{2}\), the subscript of \(O\) is \(2\). This subscript indicates the number of oxygen atoms in one formula unit of the compound. So, there are 2 oxygen atoms.

Answer:

B. 2 atoms