Electron affinity

Electronegativity

Electropositve

Ionisation enegry

Atomic radius

The amount of energy released when an electron is added to an isolated gaseous atom.

The tendency of an atom to attract electrons towards itself in a molecule of a compound.

The tendency of an element to lose electrons and form positive ions (cations)

The minimum energy needed to remove the outermost electron from the neutral atom in the gaseous state

The distance between the centre of the nucleus and the outermost shell of an isolated atom.