NEET Chemistry The s-Block Elements Questions Solved


The density of-

(A) Na > K                                                     

(B) Na = K

(C) K > Na                                                     

(D) Li > K

(A). The densities of elements of group 1 are quite low (Li = 0.534 g/cc, Na = 0.972, K = 0.559, Rb = 1.53, Cs = 1.903).
It increases gradually in moving from Li to Cs. However potassium is lighter than sodium probably due to an unusual increase in atomic size of potassium.

Difficulty Level:

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