Chemical Bonds

Ionic bonds are attractions between oppositely charged atoms or groups of atoms where electrons are donated and accepted.

Covalent bonds result from a sharing of electrons between two atoms and hold most biomolecules together.

A hydrogen bond is a strong intermolecular force created by the relative positivity of hydrogen atoms.

The mole is represented by Avogadro's number, which is 6.02×10²³ mol^-1.

The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance.