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    Electron Configurations

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    The general electron configuration for atoms of all elements in Group 5A is ________.

    ns2np6
    ns2np5
    ns2np4
    ns2np3
    ns2np1

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    Which element has the following electron configuration?

    [Kr]5s24d105p1

    Sn
    Sb
    Cd
    Ga
    In

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    Which element forms stable +2 cations?

    Kr
    I
    Se
    Al
    Ba

    --------------------------------------------------------------------------------

    Which two electron configurations represent elements that would have similar chemical properties?

    1s22s22p4
    1s22s22p5
    [Ar]4s23d104p3
    [Ar]4s23d104p4
    1, 2
    1, 3
    1, 4
    2, 4
    2, 3

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    Which of the following is the electron configuration for the Al3+ ion?

    1s22s22p63s2
    1s22s22p63s23p2
    1s22s22p63s23p1
    1s22s22p6
    1s22s22p63s23p4

    --------------------------------------------------------------------------------

    The sulfide ion S2- is isoelectronic with which one of the following?

    O2-
    F-
    Na+
    Al3+
    K+

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    How many 3d electrons does an Fe3+ ion have?

    9
    6
    5
    4
    3

    --------------------------------------------------------------------------------

    Which of the atoms listed below will have the largest radius?

    B
    Ga
    Br
    Si
    Cl

    --------------------------------------------------------------------------------

    Arrange the following ions in order of increasing ionic radius: K+, P3-, S2-, Cl-.

    K+, Cl-, S2-, P3-
    K+, P3-, S2-, Cl-
    P3-, S2-, Cl-, K+
    Cl-, S2-, P3-, K+
    Cl-, S2-, K+, P3-

    --------------------------------------------------------------------------------

    Which element will have the smallest ionization energy?

    Li
    Na
    Be
    K
    Rb

    --------------------------------------------------------------------------------

    Which of the following atoms has the greatest electron affinity (largest positive value)?

    S
    P
    Ga
    Li
    Br

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    https://brainmass.com/chemistry/modern-quantum-theory/electron-configurations-241274

    Solution Summary

    Electron configurations are investigated. Full explanations are provided.

    $2.19