Question

atom
ion
isotope

• a nitrogen atom has an equal number of protons, neutrons, and electrons
• a nitrogen ion has more electrons than protons and carries a negative charge
• an isotope of nitrogen has one more neutron than the nitrogen atom giving it a greater atomic mass

Explanation:

An atom has equal protons and electrons. An ion has a charge due to electron gain/loss. Isotopes have same protons but different neutrons.

Answer:

The descriptions about atom, ion, and isotope of nitrogen are correct.