chemistry

Which of the following statements concerning differences between ionic and molecular compounds is correct?

Molecular compounds contains two elements, and ionic compounds contain three of more elements

ionic compounds contain oxygen, and molecular compounds do not.

molecular compounds possess a molecular structural unit, and ionic compounds do not

more than one correct response

no correct response

Thanks

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  1. 1 could be right in some cases but not always.
    2 could be right in some cases but not always.
    3 is always correct.

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