Fundamental chemical concepts: Atomic mass, molecules, and ions

1.

Atomic mass, molecules, and ions

1.	Atomic number Difficulty: medium	3
2.	Mass number Difficulty: medium	2
3.	Atomicity Difficulty: easy	2
4.	Molecules of compounds Difficulty: hard	2
5.	Molecules of elements and compounds Difficulty: easy	2
6.	Elements and compounds Difficulty: medium	3
7.	HOTS - Ions Difficulty: medium	1
8.	Exemplar - Cations and anions Difficulty: medium	3
9.	Charged particles Difficulty: medium	1
10.	Ionisation Difficulty: hard	2

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Methodical recommendation

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