Pls what is the difference between valency,ionization and electron?

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.

Ionisation is a process where an atom, molecule or a substance is converted into an ion or ions.

Electron is a sub-atomic particle, carrying a negative charge and a negligible mass, that can be found on the shells of an atom. They are the primary carrier of electricity in solids.