Hydrogen Atom Weight

Definition

The weight of a hydrogen atom is approximately 1 atomic mass unit (amu), as it consists of one proton and one electron (the neutron count in a common hydrogen atom is zero).

Related terms

Isotope:

Variants of an element that have different numbers of neutrons but same number of protons.

Deuterium: An isotope of hydrogen with one neutron, making its atomic weight approximately 2 amu.

Tritium: Another isotope of hydrogen with two neutrons and one proton, giving it an atomic weight around 3 amu.