Which order/s is/are correct regarding melting point?

Ne > Ar > Xe > Kr > Rn

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Ne<Ar < Kr < Xe < Rn

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Li > Na> K > Rb > Cs

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None of the above

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Solution

The correct options are
B Ne<Ar < Kr < Xe < Rn
C Li > Na> K > Rb > Cs
(B) As the atomic number increases, the melting point increases for inert gases.
(C) For alkali metals, as the atomic number increases, the melting point decreases.

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H e, N e, A r, K r, X e

X e > K r > A r > N e > H e

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