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Atomic Radius
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Boron (B) or Indium (In)? WHY?
Which is bigger? Boron (B) or Indium (In)? WHY?
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More energy levels – valence electrons are farther from nucleus
Which is bigger? Indium (In) More energy levels – valence electrons are farther from nucleus
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Niobium (Nb) or Cadmium (Cd)? WHY?
Which is bigger? Niobium (Nb) or Cadmium (Cd)? WHY?
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Which is bigger? Niobium (Nb) Fewer protons – valence electrons are not as attracted to the nucleus
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Xenon (Xe) or Radon (Rn)? WHY?
Which is bigger? Xenon (Xe) or Radon (Rn)? WHY?
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More energy levels – valence electrons are farther from nucleus
Which is bigger? Radon (Rn) More energy levels – valence electrons are farther from nucleus
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Uranium (U) or Francium (Fr)? WHY?
Which is bigger? Uranium (U) or Francium (Fr)? WHY?
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Fewer protons – valence electrons are not as attracted to the nucleus
Which is bigger? Francium (Fr) Fewer protons – valence electrons are not as attracted to the nucleus
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As Zeff increases across a period…
What happens to atomic radius?
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As Zeff increases across a period…
Radius decreases – effective core charge increases, so valence electrons are more attracted to the nucleus
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As the number of shells increases down a group…
What happens to atomic radius?
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As the number of shells increases down a group…
Radius increases – valence electrons are farther from the nucleus
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What is the SMALLEST atom on the periodic table? WHY?
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What is the SMALLEST atom on the periodic table?
Helium – fewest number of energy levels, greater Zeff than hydrogen
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