Final answer:
The number of neutrons in a hydrogen atom can vary depending on its isotope. The most common isotope, ¹H, has no neutrons. The isotope deuterium, ²H, has one neutron, and tritium, ³H, has two neutrons.
Step-by-step explanation:
A hydrogen atom is the simplest atom in the universe, consisting of one proton in its nucleus and one electron orbiting the nucleus. The chemical symbol for a hydrogen atom is H.
Hydrogen atoms can have different numbers of neutrons, depending on the isotope. The most common isotope of hydrogen, ¹H, has no neutrons. However, there is another isotope called deuterium, ²H, that has one neutron in addition to the proton. There is also a rare isotope called tritium, ³H, which has two neutrons along with the proton.
Therefore, the number of neutrons in a hydrogen atom can be either 0, 1, or 2, depending on the specific isotope.