Atoms, molecules, and the mole concept. Science TNSB Mentoring, Class 10: lessons, tests, tasks.

1.	Atomicity Difficulty: easy	3
2.	Gram molecular mass Difficulty: easy	1
3.	Atoms and molecules - I Difficulty: easy	2
4.	Molecules Difficulty: easy	1
5.	Heteroatomic molecules Difficulty: medium	2
6.	Molar mass Difficulty: medium	3
7.	Avogadro number Difficulty: medium	2
8.	Mass of the atom Difficulty: medium	2
9.	Atoms and molecules - II Difficulty: hard	5
10.	Mass of an element Difficulty: hard	5

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Atoms, molecules, and the mole concept