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Periodic Table Trends. 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

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Atomic radius
Atomic Radius

Definition: The distance from center to the outermost orbit.


Atomic radius1
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
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 lose electrons
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.


Ability to lose electrons1
Ability to lose electrons

Electron loss

Increases

Decreases


Homework
HOMEWORK

  • READ PG184-187

  • DO Q 1-3,7,8,9 ON PG 187