It is nitrogen, with it's 7 protons, 7 electrons and 7 neutrons.
Also there are some isotopes with a molecular mass of 14 g mol-1, for example 14C.
Nitrogen!!!
Nitrogen
Nitrogen is a non metal element. Mass number of it is 14.
Nitrogen is a non meta element. Atomic mass of it is 14.
Nitrogen is a metal element. Atomic mass of it is 14.
Nitrogen
Carbon is a non meta element. Atomic mass of it is 12.
Nitrogen is a non metal element. Atomic mass number of it is 14.
Nitrogen is a non metal element. Mass number of it is 14.
Carbon is a non metal element. Atomic mass number of it is 12.
carbon
Silicon is a non metal element. Atomic mass number of it is 28.