Post a New Question

Chemistry

posted by .

For each electron in a ground-state Be atom, select the set of quantum numbers that represents it. Check all that apply.

n=1 l=0 ml=-1 ms= +1/2
n=1 l=0 ml=0 ms=-1/2
n=2 l=1 ml=0 ms= -1/2
n=1 l=0 ml=0 ms=+1/2
n=2 l=1 ml=1 ms=+1/2
n=2 1=0 ml=0 ms=+1/2
n=2 l=0 ml=0 ms=-1/2
n=2 l=0 ml=0 ms=-1

I know the top one and the last one aren't correct but I don't know about the others. The hint said,"Make sure you have chosen exactly four answers" why will it have 4?

  • Chemistry -

    There are four electrons, right? So there must be four answers.
    #1 electron:
    n = 1
    l = 0
    ml = 0
    ms = +1/2

    #2 electron:
    n = 1
    l = 0
    ml = 0
    ms = -1/2
    That's two of them.

    #3 electron:
    n = 1
    l = 0 or 1
    ml = etc
    All you really need to do is to fill in the blanks as the electrons are added. I've done the two n= 1 electrons, There are now two n = 2 electrons and another hint: l = 0 fills up first.

    You're right about the top one and last one not being right.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question