The atomic weight of nitrogen is 14.
Atomic weight, also known as atomic mass, is the measure of the mass of an atom. It is expressed in atomic mass units (amu) and is the weighted average of the masses of all the naturally occurring isotopes of an element.
For nitrogen, the most abundant isotope has an atomic weight of 14 amu, which makes the atomic weight of nitrogen 14 amu. This means that, on average, one nitrogen atom weighs 14 atomic mass units.
It's important to note that atomic weight is different from atomic number, which is the number of protons in the nucleus of an atom and determines the chemical identity of the element.