What describes a combination of two or more atoms of the same element?

A molecule is defined as a combination of two or more atoms that are chemically bonded together. When it comes to the same element, such as two oxygen atoms (O₂) or two hydrogen atoms (H₂), they form molecules through covalent bonds. This means that these atoms share electrons, resulting in a stable configuration.

In the context of the options, a mixture refers to a physical combination of substances that retain their individual properties and can be separated. A compound is formed when atoms of different elements chemically bond together in a fixed ratio, creating a substance with unique properties. An element is a pure substance consisting of only one type of atom.

Given this understanding, the choice identified as a molecule accurately describes the combination of two or more of the same type of atom, highlighting the nature of chemical bonding.