Which of the following statements accurately describe the properties and behaviors of alkali metals? Select all that apply.

Alkali metals are the lightest metals, with low melting points and low densities, and they have a single valence electron that is easily lost, giving them a +1 oxidation state. Their low ionization energy makes them very reactive, especially with water, where they produce hydroxide and hydrogen gas. They are shiny, soft, and can be cut with a knife, but they oxidize quickly in air. Because of their high reactivity, they are stored under oil or in inert atmospheres. A classic example is sodium reacting with water to give sodium hydroxide and hydrogen gas.