Nitrogen has an atomic mass of about 14 amu and an atomic number of 7. how many neutrons does nitrogen have?

The Nitrogen has 7 neutrons.

Explanation:

The Atomic Number is the number of protons of an atom and is represented by Z, so:

Z = number of protons

Z = 7

The Atomic Mass is the sum of the number of protons and the number of neutrons, and is represented by A, so:

A = number of protons + number of neutrons

A = 14

And from A we have that the number of neutrons is:

Number of neutrons = A - number of protons

Number of neutrons = A - Z

Number of neutrons = 14 - 7

Number of neutrons = 7

the answer would be a

i'm pretty sure its b i might be wrong though!