Friday, September 18, 2009

TEST-54-XI-[electronic configuration]

Q.1.-
Which of the following electron configurations represents the electron configuration for a magnesium cation...Mg2+?
(a)1s22s22p63s2
(b)1s22s22p63s23p2
(c)1s22s22p6
(d)1s22s22p4
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5 comments:

  1. UnknownSeptember 20, 2009 at 11:18 AM

    Ans :(c)

    ReplyDelete
  2. AnonymousSeptember 20, 2009 at 12:59 PM

    (c) iso electronic with Ne

    ReplyDelete
  3. OnkarSeptember 20, 2009 at 7:48 PM

    Answer : (C)
    Reason : Atomic No. of Mg is 12.It's valancy is 2.Hence it donates 2 electrons & gets stability as neon.

    ReplyDelete
  4. AnonymousSeptember 20, 2009 at 7:53 PM

    Answer : (C)
    Reason : Atomic no. of Mg is 12.To get stability it donates 2 electron & gets stability as neon.

    ReplyDelete
  5. AnonymousSeptember 21, 2009 at 10:55 PM

    (b)

    ReplyDelete

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