Question

Hydrogen has three isotopes. The most common one, protium, has no neutrons. Deuterium, the second isotope, has one neutron. Tritium has two neutrons. Using this information, calculate the atomic number, mass number, and no: of neutrons of these isotopes.

Answer 1

Atomic number is the number of protons in an atom. Since these are all Hydrogen, the number of protons remains the same, and the Atomic Number for each is 1. Mass number is the number of Protons and Neutrons in an atom. So, Protium is 1, Deuterium is 2, Tritium is 3. The number of neutrons is stated in the question (Protium 0, Deuterium 1, Tritium 2). Hope this helps, if you wouldn’t mind marking brandies if it did!