April 17, 2015

Homework Help: Chemistry

Posted by Hannah on Wednesday, November 2, 2011 at 11:05am.

1) A Cobalt (II) ion has the electron configuration ____? and is ____?

The answer choices were:
[Ar] 3d5 4s2 diamagnetic
[Ar] 3d7 paramagnetic
[Ar] 3d5 4s2 para
[Ar] 3d7 dia
None of these

I chose [Ar] 3d5 4s2 diamagnetic

2) Choose the corect statement concerning ionization energies.

- The IEof Na is greater than the IE of Cl
- The IE of S is greater than the IE of O
- The IE of Se is greater than the IE of Br
- Of the elements Li, Be, and Na, Li has the smallest IE
- Of the elements K, Ca, and Sr, Ca has the greatest IE.

I chose that the IE of S is greater than the IE of O

Are these correct?

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