Part B

Which statement comparing the relationship between elements and compounds to molecules is true?
A.
A molecule can be composed of two or more atoms of the same element, like O2
, or atoms of more than one element, like all compounds.
B.
A molecule is only composed of two or more different elements, like all compounds, but two atoms of the same element cannot form a molecule.
C.
A molecule is the simplest form of matter and is the building block of both elements and compounds.
D.
A molecule is composed of two or more atoms of the same element, like O2
, but atoms of more than one type of element cannot form a molecule.

1 answer

The correct statement is:

A. A molecule can be composed of two or more atoms of the same element, like O2, or atoms of more than one element, like all compounds.

This statement accurately describes that molecules can consist of the same type of atoms (like O2, which is oxygen gas) as well as different types of atoms (as in compounds like water, H2O).

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