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April 20, 2014

Homework Help: CHEM**

Posted by K on Tuesday, November 13, 2007 at 8:04pm.

I just have 2 other questions that I just want to make sure on:

Place the following elements in order of decreasing atomic size: tellurium, bromine, argon, cesium, strontium, and selenium. (Te, Br, Ar, Cs, Sr, Se)

~~(or...the correct ranking cannot be determined)~~

I think that the correct answer is:

******* Ar, Br, Se, Te, Sr, Cs ********

Am I correct on this???



One other question to verify:

Which set of quantum numbers is "not" possible?

a) n=2, l=1, ml=0, ms=-1/2

b) n=3, l=1, ml=-2, ms=-1/2

c) n=1, l=0, ml=0, ms=-1/2

d) n=5, l=3, ml=2, ms=1/2

***I think that the correct answer, the one that is 'not' possible is "B".

Please let me know if I am correct or not.

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