Explain how the following terms are related: element, atom, molecule, chemical bound, compound, mixture, and substance.

Well,

An element is a collection of atoms (isotopes) that have the same number of protons.

Molecules are multiple atoms that bond together to form a new substance with its own unique properties.

A chemical bond is a bond between atoms that holds the atoms together to make the molecule.

A compound is a mixture of molecules that have different chemical properties.

A mixture is a mixture (redundancy) of molecules.

A substance is basically a thing, such as a particle, atom, compound, mixture, or molecule.