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Why Cs is considered as the most electro...

Why Cs is considered as the most electropositive element?
Lithium cannot be used in making photoelectric cells.
Lithium does not form alums

Text Solution

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Due to its lowest ionization energy, Cs is considered as the most electropositive element
Lithium cannot be used in making photoelectric cells because out of all the alkali metals,it has highest ionization energy and thus cannot emit electrons when exposed to light.
Due to small size, lithium does not form alums.
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Knowledge Check

  • Statement-I: Cesium is considered as the most electropositive element Statement-II: Due to its lowest ionization energy, cesium is considered as the most electropositive element

    A
    Statements-I and II are correct and statement-II is the correct explanation of statement-I.
    B
    Statements-I and II are correct but statement-II is not the correct explanation of statement-I.
    C
    Statement-I is correct but statement-II is wrong.
    D
    Statement-I is wrong but statement-II is correct.

  • Statement-I: Cesium is considered as the most electropositive element Statement-II: Due to its lowest ionization energy, cesium is considered as the most electropositive element

    A
    Statements-I and II are correct and statement-II is the correct explanation of statement-I.
    B
    Statements-I and II are correct but statement-II is not the correct explanation of statement-I.
    C
    Statement-I is correct but statement-II is wrong.
    D
    Statement-I is wrong but statement-II is correct.

  • Why Cs and K are used as electrodes in photoelectric cells ?

    A
    Due to their less ionisation energy
    B
    Due to high ionisation energy
    C
    Due to diagonal relationshiop
    D
    none of these

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    A lithium atom has three electrons. Assume the following simple picture of the atom Two electron moves close to the nucleus making up a spherical cloud it and the third moves outside the cloud in a circular orbit . Bohr's model can be used for the motion of this third electron but n = 1 state are not available to it. Calculate the ionization energy of lithium in ground state using the above picture.

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