
Tamari N. answered 09/22/15
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1)
This must mean Nitrogen and Oxygen: Nitrogen has higher first ionization energy then oxygen because nitrogen has
3 unpaired electrons on p sub level, which is considered as half filled energy orbital and it has lower energy than otherwise filled same orbital which we have for Oxygen. Oxygen has 4 electrons on the same sublevel.
2)Increasing Ca2+, Na+ and Cl-
3) Si, C, F based on electro negativity


Steve C.
than nitrogen for the reason given ny Tamari. For period three, aluminum will have a lower first IE than magnesium, and sulfur will have a lower first IE than phosphorus...
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09/23/15

Tamari N.
You got it right: First IE of
N is 1400, for O is 1310 kJ/mol
Be is 900kJ/mol, for B is 799 kJ/mol
P- 1011 kJ/mol; S -1000 kJ/mol
Mg - 736 kJ/mol; Al - 577 kJ/mol
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09/23/15
Steve C.
09/23/15