Question

which of the following elements are in the compound: *
calcium peroxide
cao₂
calcium (ca) and oxygen (o)
carbon (c) and oxygen (o)
magnesium (mg) and sulfur (s)

Explanation:

In the chemical formula \(CaO_2\), \(Ca\) represents calcium and \(O\) represents oxygen. Each element is identified by its chemical symbol. Carbon is \(C\), magnesium is \(Mg\), and sulfur is \(S\), none of which are present in \(CaO_2\). So the compound calcium peroxide contains calcium and oxygen.

Answer:

Calcium (Ca) and Oxygen (O)