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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 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.
Ability to lose electrons Electron loss Increases Decreases
HOMEWORK • READ PG184-187 • DO Q 1-3,7,8,9 ON PG 187