Chem Urgency

Can you explain what the pseudo-gas configuration is? I have the definition but I still don't understand.

I have the example..
Sn([Kr] 5s24d105p2) Sn4+ ([Kr]4d10)+4e-

I understand the first part but I don't understand the second.

  1. 👍 0
  2. 👎 0
  3. 👁 121
asked by Sami
  1. Let's take a couple that are easier to write to give examples. Na and Zn.
    11Na is 1s2 2s2 2p6 3s1. It loses the one valence electron (the 3s) to become 1s2 2s2 2p6 = 10 e and that is Ne. That is the Na +1 ion is isoelectronic with Ne and it has a filled outside shell. Thus Na atom has become a Na +1 ion that looks like Ne and this is a noble gas so we say Na has attained a noble gas configuration.

    30Zn is 1s2 2s2 2p6 3s2 3p6 3d10 4s2. Zn loses the two outside valence electrons to become
    1s2 2s2 2p6 3s2 3p6 3d10 = 28 electrons. Notice that the Zn +2 ion has all filled shells BUT 28 is not a noble gas. So we call that a psuedo noble gas (it has filled shells as a noble gas does; however, it isn't a noble gas). Now apply that to your problems. You see the element Sn loses the 5s2 and 5p2 (the four outside valence electrons) for a +4 ion but it is a pseudo noble gas (because the 4d shell is filled BUT it isn't a noble gas). Count up the electrons. It would need to have either 54 or 36 to be a noble gas configuration.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    What is the period 6 element that forms a 4+ ion with a pseudo-noble gas configuration? How can I find the solution? Thanks

    asked by Ceamus Angelina on April 6, 2018
  2. Chem

    Draw a Structural Formulae for Hydrogen Cyanide (HCN) and Cyanogen (C2N2 or CN2) Hydrogen = 1 Valency Nitrogen = 3 Valencies Carbon = 4 Valencies H-C(triple bond)N N(triple bond)C-C(triple bond)N Thank you And for a Lewis

    asked by Anthony on March 12, 2007
  3. Chem- quantum question

    Hi. My teacher is giving us a test tomorrow on quantum numbers and Iunderstand it except for Noble gas configuration. I saw the question below on it but it's not really what I need to know so any help would be great. :) Question:

    asked by Amy on March 20, 2007
  4. Chem

    How do you figure out the Noble Gas Configuration? Also, why do you not put in the "p" level and when do you( if you even do) put it in? You need to be more specific about your question. Elements that lose electrons (Na, Ca, Al,

    asked by Ty on March 20, 2007
  5. Chemistry

    How do I determine the noble gas configuration of Sm+3? I know the normal noble gas configuration of Sm is[Xe]6s2 4f6. Thanks!

    asked by Kayla on January 8, 2011
  6. Chemistry

    What is the electron configuration called that has 18 electrons in the outer energy level and all of the orbitals filled? Noble gas configuration

    asked by Bryan on November 16, 2006
  7. physics

    what is the electron configuration in the Noble Gas configuration?

    asked by may on October 18, 2009
  8. Chemistry

    Metals lose electrons under certain conditions to attain a noble-gas electron configuration. How many electrons must be lost by the element Ca? Is it 2 e^-? Which noble-gas electron configuration is attained in this process? argon

    asked by Bill on October 28, 2012
  9. Calculus

    I don't know limits fairly well. The problem is prove the limit using definition 6, lim x -> -3, 1 / (x+3)^4 = infinity. The books definition for definition 6 is, let f be a function defined on some open interval that contains a,

    asked by Anonymous on September 19, 2015
  10. AP Chemistry

    Which of the following electron configurations correspond to an excited state? Identify the atoms and write the ground-state electron configuration where appropriate. If the configuration is a noble gas, enter the noble gas in

    asked by Ferdinand on October 30, 2011

More Similar Questions