Periodic Table Trends

Atomic Radii (Trend Moving Down a Column)

Increasing - Size of outermost occupied orbital increases

Atomic Radii (Trend Moving Across a Row)

Decreasing - Effective nuclear charge increases

First Ionization Energy (Trend Moving Down a Column)

Decreasing - Outermost electrons are further away from nucleus (and therefore easier to remove)

First Ionization Energy (Trend Moving Across a Row)

Increasing - effective nuclear charge increases

Electron Affinity (Trend Moving Down a Column)

No definite trend

Electron Affinity (Trend Moving Across a Row)

Decreasing (more negative) - effective nuclear charge increases

Metallic Character (Trend Moving Down a Column)

Increasing - ionization energy decreases

Metallic Character (Trend Moving Across a Row)

Decreasing - ionization energy increases