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    GK Olympiad Hindi Math Science English
    TEXTBOOK SOLUTIONS ASK & ANSWER My Q & A

    Boron forms no compounds in unipositive state but thallium in unipositive state is quite stable. explain

    boron is small in size and the nucleaus will hold electrons close to it & does't leave them easily whereas thallium is big & it's nucleaus can't hold electrons tightly.
    • 12
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    This may be due to inert pair effect as when an electron is get ejected from Boron as1s^2 2s^2 2p^1 when this electron leaves from 2p orbital then it gets inert and will not participate in any reaction and hence form no compounds.
    • 8
    Boron shows only +3 oxidation state whereas Thallium shows both +1 & +3 oxidation state.
    Hope this will clear your doubt.
    • 4
    Boron forms no compound in unipositive state but lithum in unipositive state is quite stable
    • 1
    Boron has electronic configuration 2 s^22p^1 .It always trivalent in its compounds.on the other hand boron prefers to form unipositive ion, rather than tripositive ion .In case of thallium it has electronic configuration 6s^26p^1 .The outermost 6s^2 electrons do not take part in bonding and behave like inert gas . Therefore, thallium forms compounds in unipositive State.
    • -3

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