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Table of Contents Elements & Atoms
Particle Theory
Checkpoint 1
Periodic Table
Checkpoint 2
Chemical Symbols
Checkpoint 3
Compounds
Checkpoint 4
Checkpoint 5



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Learning Zone - The Periodic Table of the Elements

Particle theory Checkpoint 1 Periodic table

Print this page out and do the following exercises in your practical book.

Helium is an element. Helium atoms are all the same size.

helium atom helium atoms

Argon is an element. Argon atoms are also all the same size. They are however, bigger and heavier than helium atoms.

argon atom argon atoms

Question 1 What can you say about atoms of different elements are?


Particle theory Periodic table

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