Terms

Atomic Radius: distance between the nucleus and the valence level of electrons

Electronegativity: measure of the ability of an atom to attract additional electrons to itself

Ionization Energy: energy required to remove electrons from an atom

Electron Affinity: energy given when an atom gains an electron

↓ Group Trends ↓

INCREASING energy levels

INCREASING shielding effect

- so therefore -

INCREASING atomic radius

→Period Trends→

INCREASING # protons

INCREASING nuclear charge

SAME energy level

SAME shielding effect [constant]

- so therefore -

DECREASING atomic radius

ELECTRONEGATIVITY AND IONIZATION ENERGY VARIES