Class 9 - Chemistry - Atoms and Molecules - Atomicity of Elements (Worksheet)
Molecules of an element are formed by the atoms of the same type. Molecules of some elements contain only one atom and molecules of some elements contain two or more atoms. The number of atoms constituting a molecule is known as its atomicity.
Question: Here given a list of elements, identify if it is a metal or non-metal, write its atomicity and its symbolic chemical formula.
1. Argon 2. Helium 3. Oxygen
4. Hydrogen 5. Nitrogen 6. Chlorine
7. Phosphorous 8. Sulphur 9. Sodium
10. Iron 11. Aluminium 12. Copper
Answer:
SNo. | Name | Type | Atomicty | Formula |
---|---|---|---|---|
1. | Argon | Non-metal | 1-Monoatomic | Ar |
2. | Helium | Non-metal | 1-Monoatomic | He |
3. | Oxygen | Non-metal | 2-Diatomic | O₂ |
4. | Hydrogen | Non-metal | 2– Diatomic | H₂ |
5. | Nitrogen | Non-metal | 2– Diatomic | H₂ |
6. | Chlorine | Non-metal | 2– Diatomic | Cl₂ |
7. | Phosphorus | Non-metal | 4– Polyatomic | P₄ |
8. | Sulphur | Non-metal | 8– Polyatomic | S₈ |
9. | Sodium | Metal | 1– Monoatomic | Na |
10. | Iron | Metal | 1– Monoatomic | Fe |
11. | Aluminium | Metal | 1– Monoatomic | Al |
12. | Copper | Metal | 1– Monoatomic | Cu |
👉See Also:
How to learn naming Chemical Formula
Ch 3 - Atoms and Molecules
Ch 3 - Atoms and Molecules (Worksheet)
Ch3 - Atoms and Molecules (MCQs)
Ch 3 - Atoms, Molecules and Ions (Study Points)
Ch 3 - Atoms and Molecules (MCQs-2)
All about Names of the Chemical Elements
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