Question

if an element is composed of atoms with an atomic number of 6 and a mass number of 14, then a non - isotopic atom of this element contains
6 protons and 8 neutrons.
8 electrons.
8 neutrons.
6 protons.
6 protons and 8 electrons.

Explanation:

Step1: Recall atomic number concept

Atomic number = number of protons. Given atomic number is 6, so number of protons is 6.

Step2: Recall mass - number formula

Mass number = number of protons + number of neutrons. Given mass number is 14 and number of protons is 6. So number of neutrons = 14 - 6 = 8.

Step3: Analyze electron - proton relation

In a neutral non - isotopic atom, number of electrons = number of protons. Here protons are 6, so electrons should be 6 (but this is not relevant for the correct option here).

Answer:

6 protons and 8 neutrons.