CH105 - Periodic Trends

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12 Terms

1
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atomic radius

size of atom

2
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atomic radius trend

  • decrease across

  • increase down


3
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ionic radius

size of ion

4
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cation

< neutral

  • e- feel greater pull


5
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anion

> neutral

  • e- feel less pull


6
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electron shielding/Zeff

nuclear charge felt by outer e-

7
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ionization energy

energy required to remove e-

8
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ionization energy trend

  • increase across

  • decrease down


9
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electron affinity

energy release when e- added

10
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electron affinity trend

  • increase across

  • decrease down


11
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trend across P.T

  • more p+

  • greater pull on e-

  • Zeff up


12
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trend down P.T

  • higher n

  • less pull on e-

  • Zeff down