Hydrogen is used in: hydrogen fuel, weather balloons and it creates water.
Lithium is used in: Batteries, in the form of lithium carbonate it is used to control certain mental disorders and glass.
Sodium is used in: sodium chloride as table salt, sodium nitrate is an ingredient in gunpowder and sodium is important for all living organisms.
Potassium is used in: fertilizers, potassium hydroxide is used in detergents and potassium bromide is a chemical used in photography.
Rubidium is used in: a compound of rubidium is used to treat depression.
Cesium is used in: glass and radiation detection equipment.
Francium is not used in anything except for research because it is one of the rarest elements and it is a radioactive element.