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Question for the week of 11/2 - Nov 4, 2009 at 9:49AM
Dave Avatar
San Marcos, Texas
420 Posts

Hi Everyone,

     Sorry I am a little late getting this posted.  Gary's response to last week's question was correct.  His observation regarding GRE questions was also generally true.  Many GRE questions can be answered without doing a lot of calculations.  Here's this week's question.

Which of the following functions could represent the radial wave function for an electron in an atom?  (r is the distance of the electron from the nucleus, A and b are constants)

I. Aexp(-br)

II. Asin(br)

III. A/r

A. I only

B. II only

C. I and II only

D. I and III only

E. I, II, and III


Try not to become a man of success, but rather try to become a man of value -- Albert Einstein

Replies to Question for the week of 11/2

Re: Question for the week of 11/2 - Nov 05 2009 12:24PM
Ava pope
2 Posts

Its gotta be only the exponential solution!  The sine solution does not dissipate as r grows, so It cannot be correct.  The 1/r solution could work if it didn't blow up at r = 0.  Is this reasoning ok?

Post edited November 5, 2009 at 12:18 PM EST.

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