Question

hydrogen has three isotopes ¹h, ²h, and ³h. what is the difference between these three isotopes?
the number of protons ranges from 1 to 3.
the number of electrons ranges from 1 to 3.
the number of neutrons ranges from 0 to 2.
the number of protons ranges from 0 to 2.

Explanation:

Isotopes of an element have the same number of protons and electrons. The difference lies in the number of neutrons. For hydrogen - 1H (protium) has 0 neutrons, 2H (deuterium) has 1 neutron and 3H (tritium) has 2 neutrons.

Answer:

The number of neutrons ranges from 0 to 2.