Which of the substances list below is a pure element. Check all that apply: Oxygen Carbon...

Question

Question

Which of the substances list below is a pure element. Check all that apply:

Answer 1

Answer #1

Any substance present in uncombined form is pure element.

1 ) oxygen is pure element . It exists in diatomic molecular form ( O₂ )

2 ) Carbon monoxide is not element it’s compound composed of carbon and oxygen.

3 ) Calcium carbonate ( CaCO₃ ) is not element it’s compound composed of calcium , carbon and oxygen.

4 ) S₈ is a pure element .

5 ) Air is not element it is mixture of different gases.

Answer 2

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