Question

Which of the following is an isotope?

An atom with 2 protons, 3 neutrons and 2 electrons
An atom with 2 protons, 2 neutrons and 2 electrons
An atom with 2 protons, 2 neutrons and 4 electrons

Answer 1

An atom with 2 protons, 3 neutrons and 2 electrons

Step-by-step explanation:

Isotopes are atoms of the same element with the same number of protons and electrons but different number of neutrons