A molecule is two or more combined atoms of?

A molecule is defined as a group of two or more atoms that are chemically bonded together. These can be either two identical atoms, like in the case of oxygen (O2), where two oxygen atoms combine to form a molecule, or they can consist of different atoms, such as in water (H2O), which comprises two hydrogen atoms and one oxygen atom.

Therefore, the correct response indicates that a molecule can indeed be formed from both the same atoms and different atoms. This duality captures the broad range of molecular structures—from diatomic molecules, which consist of two identical atoms, to compound molecules formed from various types of atoms. This inclusive understanding is fundamental in chemistry, as recognizing that both configurations are valid helps in comprehending the diverse array of chemical substances that exist in nature.