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Ions having same number of electrons are...

Ions having same number of electrons are called isoelectronic ions.
Give example of 2 cations and 2 anions which are isoelectronic with argon.

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Ions having same number of electrons are called isoelectronic ions. Out of Na^+ and Ne which has higher ionisation enthalpy. Explain why?

K^+ and Ca^(2+) are isoelectronic with Argon. Out of Na^+ and Na which has smaller size and why?

Knowledge Check

  • Which of the following statements regarding the movement of ions in a cell is/are correct? (1) Cations move towards cathode and anions towards anode in both galvanic and electroytic cells. (2) Cations move towards cathode and anions towards anode in an electroytic cell and the reverse is true for a galavanic cell (3) Cations move towards cathode and anions towards anode in a galvanic cell and the reverse-is true for an electrolytic cell (4) Cations move towards anode and anions towards cathode in a galvanic cell and the reverse is true 'for an electrolytic cell

    A
    Cations move towards cathode and anions towards anode in both galvanic and electroytic cells.
    B
    Cations move towards^cajhode'and anions towards anode in an electroytic cell and the reverse is true for a galavanic cell
    C
    Cations move towards cathode and anions towards anode in a galvanic celland the reverse-is true for an electrolytic cell
    D
    Cations'move towards anode and anions towards cathode in a galvanic cell and the reverse is true 'for an electrolytic cell

  • Assertion: The ionic size of O^(2-) is bigger than that of F^(-) ion. Reason: The O^(2-) and F^(-) are isoelectronic ions.

    A
    If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
    B
    If both (A) and (R) are correct, but (R) is not the correct explanation of (A)
    C
    If (A) is correct, but (R) is incorrect.
    D
    If both (A) and (R) are incorrect.

  • In an ionic bond, the cation tends to polarize the electron cloud of the anion by pulling electron dens towards itself. This causes development of covalent character in the ionic bond because the electron dens gets localised in-between the nuclei. The tendency of the cation to bring about the polarization of the anion expressed as its polarizing power. The ability of ion to undergo polarization is called its polarisability. The polarising power of a cation or an anion is decided on the basis of Fajans' rules. The ionic conductance of which of the following is the highest?

    A
    `Li^+(aq) `
    B
    `Na^+ (aq)`
    C
    `K^+ (aq)`
    D
    `Cs^+ (aq)`

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    The ions of NaF and MgO have the same number of electrons and internuclear distances are also about the same ( 235 pm and 215 pm ). Then why the melting points of NaF and MgO are different ( 992^circ C. and 2642^circ C resp.)

    K^+ and Ca^(2+) are isoelectronic with Argon. Explain what is isoelectronic ions.

    Write the electronic configuraiton of Mg 2+ ion

    Predict the number of unpaired electrons in the squar planar [Pt(CN)_4]^(2-) ion.

    In an ionic bond, the cation tends to polarize the electron cloud of the anion by pulling electron dens towards itself. This causes development of covalent character in the ionic bond because the electron dens gets localised in-between the nuclei. The tendency of the cation to bring about the polarization of the anion expressed as its polarizing power. The ability of ion to undergo polarization is called its polarisability. The polarising power of a cation or an anion is decided on the basis of Fajans' rules. Arrange the following species in decreasing order of polarising powers: Ag^+ , Tl^+ , Na^+

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