One of the alkali metals reacts with oxygen to form a solid

Last updated: 8/3/2022

One of the alkali metals reacts with oxygen to form a solid white substance. When this substance is dissolved in water, the solution gives a positive test for hydrogen peroxide, H₂O₂. When the solution is tested in a burner flame, a lilac-purple flame is produced. What is the likely identity of the metal? Express your answer as a chemical symbol. Write a balanced chemical equation for reaction of the white substance with water. Express your answer as a chemical equation. Identify all of the phases in your answer.