Which statement about atoms and molecules is correct?

Elements always exist as separate atoms

Elements always exist as pairs of atoms called
molecules

Elements and compounds can exist as molecules

Elements always exist as pair of atoms called molecules .

Explanation:-

The material which has only one types of similar atoms called element .Ex:-Sodium,Carbon etc

Elements always exists as pairs of atoms called molecules

Explanation:

Elements are simply substances in its pure form.The atom of an element is simply referring to a single element. eg we have sodium atom as Na, it appears singly and in its pure form A molecule then refers to when an atom of the same element is paired up. i.e not in a single state. eg, we have one atom of hydrogen molecule as H2, Oxygen molecule as O2. Note. the molecular elements appear in pairs while the atomic elements appear singly.

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