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give 2 examples of polyatomic elements

Polyatomic element: A polyatomic element is an element which needs two or more of the same atoms bonded into a molecule to exist naturally. 
Examples: H2 , O2 , N2 , P4 , S8

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sulphur and selenium are the two polyatomic elements.

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H2 , O2 , N2 , P4 ....etc

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S8,O3

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sulphur, ozone, phosporous, 

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