Question #43205

1 Answer
reudhreghs
Oct 25, 2017

Z = 7
E = 7
N = 13

Explanation:

The atomic number Z is the same as the proton number, so we know that nitrogen must by definition have 7 protons.

If it is an atom, and not an ion, then it must have Z = E, protons equals electrons, so it must also have 7 electrons for no overall charge.

The mass number is given by A = Z + N, protons plus neutrons, so we can say that N = A - Z, neutrons is mass minus protons, so there are 20-7=13 neutrons.

Related questions
Impact of this question
1067 views around the world
You can reuse this answer
Creative Commons License