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Define ionic radius....

Define ionic radius.

Text Solution

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Ionic radius is the distance from the nucleus of an ion to the point up to which the nucleus has influence on its electron cloud.
OR
Ionic radius is the distance from the nucleus of an ion to the outer most orbital containing electrons.
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Define atomic radius.

Define the term ionic radius. Justify that the radius of anion is larger than the parent atom.

Knowledge Check

  • The set representing the correct order of ionic radius is

    A
    `Li^(+)gtBe^(2+)gtNa^(+)gtMg^(2+)`
    B
    `Na^(+)gtLi^(+)gtMg^(2+)gtBe^(2+)`
    C
    `Li^(+)gtNa^(+)gtMg^(2+)gtBe^(2+)`
    D
    `Mg^(2+)gtBe^(2+)gtLi^(+)gtNa^(+)`

  • The edge length of the unit cell of NaCl crystal lattice is 552 pm. If the ionic radius of sodium ion is 95 pm. What is the ionic radius of chloride ion.

    A
    368 pm
    B
    190 pm
    C
    276 pm
    D
    181 pm

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    Explain Pauling method to determine ionic radii.

    Define ionic hydrides.

    Explain the variation of ionic radius down a group and across period.

    Arrange the following in the decreasing order of their ionic radius: N^(3-),Mg^(2+) ,Na^(+) ,O^(2-)

    The unit cube length for LiCl ( NaCl structure) is 5.14 Å . Assuming anion-anion contact, calculate the ionic radius for chloride ion.

    What are Iso-electronic species? Arrange the following in the increasing order of their ionic radius N^(-3),Mg^(+2),Na^(+) and O^(-2) .

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