Alkali metal

The video tutorial discusses alkali metals, which are part of Group One in the periodic table. These metals include lithium, sodium, potassium, rubidium, cesium, and francium. They are characterized by being soft, having low density, and reacting easily with air and water to form alkaline compounds. The reactivity of these metals increases with their atomic number, and they are often stored in oil to prevent combustion or corrosion.

What trend in reactivity is observed among alkali metals?

Why are alkali metals often stored in oil?