Question

The nuclei of isotopes of a given element contain the same number of ______.

Options

• Neutrons

• Neutrinos

• Positrons

• Protons

Answer 1

The nuclei of isotopes of a given element contain the same number of protons.

Explanation:

Isotopes are different neutron number variants of the same chemical element. Each atom in all isotopes of a specific element has the same number of protons. Example:

`"_1^1H` Protium	`"_1^2H` Deuterium	`"_1^3H` Tritium