Question

atomic composition quick check
a nitrogen ion has a mass of 14 and a charge of +2. which subatomic particles does it contain? (1 point)
4 protons, 4 neutrons, and 6 electrons
7 protons, 7 neutrons, and 5 electrons
2 protons, 6 neutrons, and 6 electrons
7 protons, 7 neutrons, and 9 electrons

Explanation:

Nitrogen has an atomic number of 7, so it has 7 protons. Mass number is the sum of protons and neutrons. Given mass number 14, neutrons = 14 - 7=7. A charge of +2 means 2 electrons are lost. Neutral nitrogen has 7 electrons, so the ion has 7 - 2 = 5 electrons.

Answer:

7 protons, 7 neutrons, and 5 electrons