Thursday, 10 December 2020

Class 9 - Chemistry - Atoms and Molecules - Atomicity of Elements (Worksheet)#class9Chemistry #eduvictors #cbse2020

Class 9 - Chemistry - Atoms and Molecules - Atomicity of Elements (Worksheet)

Class 9 - Chemistry - Atoms and Molecules - Atomicity of Elements (Worksheet)#class9Chemistry #eduvictors #cbse2020


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

1 comment:

  1. somewhat helpful because it gives you easy tips to learn better

    ReplyDelete

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