Atomic Number and Mass Number - Interactive Chemistry

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⚛️ Atomic Data

Hydrogen

1 1 H

Protons (Z)

Neutrons

Electrons

Atomic Number (Z): 1

Mass Number (A): 1

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📚 Key Concepts

Atomic Number (Z): The number of protons in an atom's nucleus. This defines the element.

Mass Number (A): The sum of protons and neutrons (nucleons) in the nucleus. This determines the atom's mass.

Atomic Number & Mass Number

Ready to Begin

⚛️ Atomic Data

📚 Key Concepts