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What does the atomic number represent?
Atomic Number, Mass Number, and Net Electric Charge
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What's Inside an Atom? Protons, Electrons, and Neutrons!
Atomic number of an element represents:
Basic Periodic Trends WS - Stepwise Solutions
Elements and atomic number | Atoms, isotopes, and ions | High school chemistry | Khan Academy
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Atom Explained in Simple Terms
Atomic Number | Atoms and Molecules | Don't Memorise
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Periodic Table Explained: Introduction
How to Read the Periodic Table
Atoms for Kids | What is an atom? | Learn about atoms and molecules with activities and worksheets
What Is An Atom And How Do We Know?
Atomic number, Atomic mass, Mass number: What's the difference?
What is an Atom ?
