The following statements describe a molecule:
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It can be two or more different elements combined. - This describes a compound, which is a type of molecule made from different elements.
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It can be one element by itself. - This refers to diatomic molecules, such as O₂ or N₂, which consist of two atoms of the same element.
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It can be two or more of the same elements combined together. - This describes diatomic or polyatomic molecules composed of the same type of element, like O₂ or S₈.
The statement "It can be the combination of different neutrons" does not accurately describe a molecule, as molecules are defined by their arrangement of atoms, not neutrons.
Thus, the correct selections are:
- It can be two or more different elements combined.
- It can be one element by itself.
- It can be two or more of the same elements combined together.
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