Which of the following is a correct statement about molecules of elements?
They consist of two or more atoms of the same element.
A molecule is a group of two or more atoms held together by chemical bonds. When those atoms belong to the same element, the molecule is called a molecule of an element (for example O2, N2, H2, P4, S8). When the atoms belong to different elements, the resulting molecule is a molecule of a compound (like H2O or CO2), not of an element.
Molecules of elements are not always monoatomic; only noble gases exist as single atoms, while most non-metals form diatomic or polyatomic molecules. They can also exist in solid, liquid or gaseous form depending on the element and conditions.
Hence, the answer is They consist of two or more atoms of the same element.
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