Section 3 Smore

Electron Configuration and Periodic Properties

Atomic Radii

Atomic Radius may be defined as one-half the distance between the nuclei of identical atoms that are bounded together.

Radii increases as you go down to the next group.

Electron Affinity

The energy change that occurs when an electron is acquired by a neutral atom

Ionization Energy

The energy needed to remove one electron from a neutral atom of an element
Ionization is any process that results in the formation of an ion
A + energy —≥ A+ + e-

An Ion is an atom or group of bonded atoms that has a positive or negative charge.

Cation is a positive ion
Anion is a negative ion

Valence Electrons

Valence Electrons are the electrons available to be lost, gained, or shared in the formation of chemical compound


Electronegativity is a measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound