What is the formula for rubidium nitrate?

The formula for rubidium nitrate is RbNO3. Each element in the compound is represented by a symbol, while the numbers after each symbol indicate the number of atoms of that element contained in one molecule of rubidium nitrate.

Rubidium nitrate contains one atom of rubidium, represented by the symbol Rb; one atom of nitrogen, represented by the symbol N; and three atoms of oxygen, represented by the symbol O3. Rubidium nitrate can be formed through a reaction of rubidium and nitric acid or a reaction of rubidium hydroxide with nitric acid. It is used in the preparation of fireworks to produce a reddish, violet hue.