Question

8a what event is occuring? 8b circle chemical change or physical change

Explanation:

Step1: Analyze the reaction

Magnesium ribbon burns in air with a bright light. This is a chemical reaction where magnesium (Mg) reacts with oxygen (O₂) in the air to form magnesium oxide (MgO).
The chemical equation for this reaction is \(2Mg + O_{2}\xrightarrow{\text{heat}}2MgO\).

Step2: Classify the change

A chemical change results in the formation of new substances with different chemical properties. Since magnesium is changing into magnesium oxide during the burning process, it is a chemical change.

Answer:

8a. Magnesium ribbon is burning in air, reacting with oxygen to form magnesium oxide.
8b. Chemical Change