Periodic trends

Ionization Energy

The amount of energy required to remove an electron from an atom.

Atomic Radius

The distance from the nucleus of an atom to the outermost electron shell.

Electronegativity

The ability of an atom to attract electrons in a chemical bond.

Electron Affinity

The change in energy when an electron is added to a neutral atom.

Trends in a Group (Top to Bottom): Ionization Energy

Decreases as you move down a group.

Trends in a Group (Top to Bottom): Atomic Radius

Increases as you move down a group.

Trends in a Group (Top to Bottom): Electronegativity

Decreases as you move down a group.

Trends in a Group (Top to Bottom): Electron Affinity

Decreases as you move down a group.

Trends in a Period (Left to Right): Ionization Energy

Increases as you move from left to right across a period.

Trends in a Period (Left to Right): Atomic Radius

Decreases as you move from left to right across a period.

Trends in a Period (Left to Right): Electronegativity

Increases as you move from left to right across a period.

Trends in a Period (Left to Right): Electron Affinity

Increases as you move from left to right across a period.