Question #43205

1 Answer
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.