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## PowerPoint Slideshow about ' Periodic Table Trends' - lysa

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Atomic Radius

Definition: The distance from center to the outermost orbit.

Atomic Radius

- Increases as you move down a group
- # of orbits increase

- Decreases as you move across a period
- # of orbits stay the same but # of protons increase which pulls the electrons closer

Ability to gain electrons

- Decreases as you move down a group
- # of orbits increase, therefore inner electrons shield the attractive forces of the nucleus - attractive force not strong enough to gain electrons onto the outermost orbit

- Increases as you move across a period
- Stronger nuclear charge as the # of orbits stays the same but # of protons increase- allows for gain of electron on the outermost orbit

Ability to gain electrons

Electron gain

Ability to lose electrons

- Increases as you move down a group
- # of orbits increase, therefore inner electrons shield the attractive forces of the nucleus - easier to loose an electron in the outermost orbit.

- Decreases as you move across a period
- Stronger nuclear charge as the # of orbits stays the same but # of protons increase- strong attractive forces prevent electron from being lost.

HOMEWORK

- READ PG184-187
- DO Q 1-3,7,8,9 ON PG 187

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