Arrange the following elements in order of increasing first ionization energy: Sulfur (S, 16); Argon (Ar, 18); Calcium (Ca, 20)

Arrange the following elements in order of increasing first ionization energy: Sulfur (S, 16); Argon (Ar, 18); Calcium (Ca, 20)

Arrange the following elements in order of increasing first ionization energy: Sulfur (S, 16); Argon (Ar, 18); Calcium (Ca, 20) 



(a) S < Ar < Ca
(b) Ar < S < Ca
(c) Ca < Ar < S
(d) S < Ca < Ar
(e) Ca < S < Ar


Answer: (e) Ca < S < Ar


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