Periodic TableMedium
Question
Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar ?
Options
A.Ca < S < Ba < Se < Ar
B.S < Se < Ca < Ba < Ar
C.Ba < Ca < Se < S < Ar
D.Ca < Ba S < Se < Ar
Solution
(i) In a group the I.E. decreases. Hence Ca > Ba and S > Se
(ii) In a period, I.E. increases from left to right in general.
Hence Ar > S and Se > Ca
Hence the order is Ar > S > Se > Ca > Ba and the answer is (3).
(ii) In a period, I.E. increases from left to right in general.
Hence Ar > S and Se > Ca
Hence the order is Ar > S > Se > Ca > Ba and the answer is (3).
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