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Atomic Number Definition

Glossary Definition of Atomic Number

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Hydrogen has an atomic number of 1.

Protium is an isotope of the element hydrogen, which has one proton and thus an atomic number of 1. Protium has one proton and one electron, but no neutrons.

Blacklemon67, Wikipedia Commons

Atomic Number Definition: The number of protons in an element.

Examples: The atomic number of hydrogen is 1; the atomic number of carbon is 6.

Also Known As: The atomic number is also known as the proton number. It may be represented by the capital letter Z.

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