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Introduction to Atomic Structure

The Structure of the Atom
Atoms of any element contain three types of fundamental particle; protons, neutrons and
electrons.
The protons and neutrons are found in the central nucleus.
The electrons are arranged in groups (called shells or energy levels) around the nucleus.

Fundamental Particle Relative…

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Atomic Number and Mass Number

Atomic Number (Z) = Number of Protons in the nucleus

Mass Number (A) = Number of Protons and Neutrons in the nucleus

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