Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction.

In chemistry, an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds.

In chemistry, an ionic compound is a chemical compound in which ions are held together in a structure by electrostatic forces termed ionic bonds.

Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules.

A covalent compound is a molecule formed by covalent bonds , in which the atoms share one or more pairs of valence electrons.

Iodine is a chemical element with symbol I and atomic number 53.