The name is Phosphorus and the symbol is P. Its atomic number is 15 and its mass number is 30.9738. It is in period 3 and group 15. It's in the Nitrogen group. It is a non-metal in the form of a gas.
It is used in all matches since it is flammable
It's in fireworks because once it heats it becomes extremely bright.
It is in baking soda as the compound Calcium Phosphate.