* Atomic Number: 1. This means hydrogen has one proton in its nucleus.
* Atomic Mass: Approximately 1.008 atomic mass units (amu). This is the average mass of all naturally occurring isotopes of hydrogen.
* Number of Neutrons: Most hydrogen atoms have no neutrons in their nucleus. This is because the most common isotope of hydrogen, protium (¹H), only has one proton. However, there are two other isotopes:
* Deuterium (²H): Has one proton and one neutron.
* Tritium (³H): Has one proton and two neutrons.
Important Note: The atomic mass of hydrogen is an average because it takes into account the relative abundance of all its isotopes in nature.
