Groups of two or more atoms held together by chemical bonds are called:

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Groups of two or more atoms held together by chemical bonds are called:

A molecule is formed when two or more atoms are held together by chemical bonds. This includes simple cases like O2 or H2, as well as more complex ones like H2O. The key idea is a discrete group of atoms bonded together that can exist on its own and has the properties of that unit. Compounds are molecules that contain two or more different elements, but the basic definition here is any bonded group of two or more atoms. Ions are charged species, not neutral bonded groups, and elements are substances made of a single type of atom. So the term that fits the description best is molecule.

A molecule is formed when two or more atoms are held together by chemical bonds. This includes simple cases like O2 or H2, as well as more complex ones like H2O. The key idea is a discrete group of atoms bonded together that can exist on its own and has the properties of that unit. Compounds are molecules that contain two or more different elements, but the basic definition here is any bonded group of two or more atoms. Ions are charged species, not neutral bonded groups, and elements are substances made of a single type of atom. So the term that fits the description best is molecule.

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