GC Question!!!

[PooyaH]

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Hey guys,

Does Oxygen have a higher ionization energy or Nitrogen? I know that ionization energy increases from left to right, however, Nitrogen has one electron in each of its p orbitals and doesn't want to give them up that easy! So which one has a higher IE?

Thanks!

 

[Simiam]

I was incorrect. So sad 🙁

 

[Shjfr]

N has 3 electrons in the p orbital, O has 4. Because O has that paired electron it creates repulsions, and it will give up an electron more readily than N will.


Nitrogen I.E. > Oxygen I.E.


Wouldn't think they would do something like this on the DAT... but who knows.

 

[PooyaH]

N has 3 electrons in the p orbital, O has 4. Because O has that paired electron it creates repulsions, and it will give up an electron more readily than N will.


Nitrogen I.E. > Oxygen I.E.


Wouldn't think they would do something like this on the DAT... but who knows.

That's exactly what I think too! I was just wondering if they put that on the test, which one should I pick! lol

 

[harrygt]

That's exactly what I think too! I was just wondering if they put that on the test, which one should I pick! lol

Hey Pooya. You are right. The ionizatin energy increase from left to right in each period except two cases. it decreased from grou II A to III A , and it aslo decreases from group VA to VI A. Mg has a higher first ionization energy than Al. Phosphorus has higher E1 than Sulfur. Nitrogen has higher E1 than Oxygen, and many other example in these cases. Nice call on this! It's pretty important and I would not be suprised to see this on DAT.

 

[boxdesker]

Wow, never knew this. Thanks!

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch7/graphics/ch7_13.gif

(to help visualize)

 

[PooyaH]

Hey Pooya. You are right. The ionizatin energy increase from left to right in each period except two cases. it decreased from grou II A to III A , and it aslo decreases from group VA to VI A. Mg has a higher first ionization energy than Al. Phosphorus has higher E1 than Sulfur. Nitrogen has higher E1 than Oxygen, and many other example in these cases. Nice call on this! It's pretty important and I would not be suprised to see this on DAT.

Hey buddy, yeah I think it's the same thing with transition metals like Zn and Cd which have their d orbitals full! For instance, Zn would have a higher IE than Ga! I just hope I see nothing close to this on the test! lol

 

[smile101]

I have seen one of these on practice, but the question mentioned that the ionization energy of N is greater than O and had five choices for me to reason out why it is so...So, I just hope that they would ask it this way.

 

[nixon13]

Why does it change for groups 1A and 2a and also 5a and 6a?

 

[250rsavage]

Atoms prefer to be in either full orbitals or half filled orbitals. So group 2 has a full s orbital, and group 5 have a half filled P orbital. So in both cases, it will take a higher IE to remove an electron. Like Pooyah said it also holds true for the transition metals. Just see if they have half or filled orbitals and they will require more energy.