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 how to find atomicity of an element?

Atomicity is the number of atoms of an element present in one molecule of that element.

For example, there are 2 atoms of hydrogen present in H2 molecule. So its atomicity is 2.

The gases can be

· monatomic, example: Helium (He)

· diatomic, example: hydrogen (H2)

· triatomic , example: ozone (O3)

· polyatomic, example: sulphur (S8).

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The number of atoms constituting a molecule is known as its atomicity. 
On the basis of atoms present in that particular element we can find out the atomicity. 
To find the atomicity you should know the valency of that atom. Try to remember the atomic number of the elements in the periodic table. From this you can easily find out the electronic configuration and hence the valency.

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 The number of atoms constituting a molecule is known as its atomicity.
On the basis of atoms present in that particular element we can find out the atomicity.
To find the atomicity you should know the valency of that atom. Try to remember the atomic number of the elements in the periodic table. From this you can easily find out the electronic configuration and hence the valency.

hope u understood !!

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