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The ionisation energy of hydrogen is hig...

The ionisation energy of hydrogen is high as compared to alkali metals because of

A

One electron in outemost shell

B

Small size

C

One proton in its nucleus

D

No neutron

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The alkali metals

    A
    form salt-like hydrides
    B
    form predominantly covalent salts
    C
    show decreased chemical reactivity with oxygen in going from Li to Cs
    D
    show increasing electronegativity form Li to Cs.

  • The ionisation energy of nitrogen is more than that of oxygen because

    A
    Extra stability of half filled orbitals
    B
    More number of energy levels
    C
    Less number of valence electrons
    D
    Smaller size

  • The ionisation energy of alkali metals decreases from Li to Cs bacause

    A
    the atomic size increases from Li to Cs
    B
    The sitance betweenn nucleus and outermost orbital decreases from Li to Cs
    C
    electropositive character decreases down the group
    D
    melting point decreases from Li to Cs.