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7/26/2019 015-Ionization Energy II
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Slightly EnlargedI1 for Be, Mg, and Ca
7/26/2019 015-Ionization Energy II
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Slightly EnlargedI1 for Be, Mg, and Ca
The electrons in the filled 2s orbital provide
some shielding for electrons in the 2p orbital
from the nuclear charge. (p93, 2) A 2s electron spends more time closer to the nucleus
than a 2p electron.
7/26/2019 015-Ionization Energy II
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Slightly ReduceI1 for O and S
7/26/2019 015-Ionization Energy II
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Slightly ReduceI1 for O and S
The extra electron repulsions in the doublyoccupied oxygen 2p orbital. (p93, 2)
7/26/2019 015-Ionization Energy II
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2A Configuration: LargerI
7/26/2019 015-Ionization Energy II
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6A Configuration: SmallerI ?!
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Trends in the 1st Ionization Energies
for the Representative Elements
p93, Figure 2.33