What word equation that represents the decomposition of calium nitrate into calcium nitrite and oxygen

What is the chemical formula of the following compound

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

You can smell perfume because of which change of state