Compounds

Compounds

Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio. Chemistry is the study of the structures, physical properties, and chemical properties of material substances. In chemistry, a compound is a substance that results from a combination of two or more different chemical element s, in such a way that the atom s of the different elements are held together by chemical bonds that are difficult to break. Examples of compounds include table salt or sodium chloride (NaCl, an ionic compound), sucrose (a molecule), nitrogen gas (N2, a covalent molecule), a sample of copper (intermetallic), and water (H2O, a covalent molecule).

A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. A compound is a substance that contains atoms of two or more different elements, and these atoms are chemically joined together. For example, water is a compound of hydrogen and oxygen. Each of its molecules contains two hydrogen atoms and one oxygen atom.