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Periodic Table Trends

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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Periodic Table Trends

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  1. Periodic Table Trends

  2. Atomic Radius Definition: The distance from center to the outermost orbit.

  3. 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

  4. Atomic Radius

  5. 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

  6. Ability to gain electrons Electron gain

  7. 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.

  8. Ability to lose electrons Electron loss Increases Decreases

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

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