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Correct trend regarding density of alkalimetals is

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By Expert Faculty of Sri Chaitanya
a
Li < Na < K < Rb < Cs
b
Li < Na < Rb < K < Cs
c
Li < K < Na < Rb < Cs
d
Li < K < Na < Cs < Rb
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detailed solution

Correct option is C

Density down the group increasesExpected trend: Li < Na < K < Rb < Cs; Due to larger interatomic distances and availability of vacant d-orbitals in potassium, density of potassium is less than that of sodium;Actual trend; Li < K < Na < Rb < Cs


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