Matter consisting of all the same kind of atoms is called an?

Matter that consists of all the same kind of atoms is defined as an element. Elements are the fundamental substances that cannot be broken down into simpler substances through chemical means. Each element is characterized by a specific number of protons in its atomic nucleus, which determines its unique properties and position in the periodic table.

For instance, oxygen (O) is an element because it is made up entirely of oxygen atoms. In contrast, a compound consists of two or more different types of atoms that are chemically bonded together, such as water (H₂O), which is made up of both hydrogen and oxygen atoms. A mixture refers to a physical combination of substances that retain their individual properties and can usually be separated easily, like sand and salt. A solution is a specific type of mixture where one substance (the solute) is dissolved in another (the solvent), such as saltwater.

Understanding these distinctions is crucial within the context of chemistry and material science, and recognizing that an element is solely made up of identical atoms is fundamental knowledge for anyone studying these topics.