Which describes the number of protons in the atom of a particular element

Atomic Number

Explanation:

The number of protons an atom has is unique to that element. The number of protons is noted as the atomic number for that element on the periodic table.

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.