Arrange the following in order of increasing ionization energy: Li,Cs,K.
A)K

Name: Arrange the following in order of increasing ionization energy: Li,Cs,K. A)K < Li < Cs B)Cs < K < Li C)Li < Cs < K D)Cs < Li < K E)K < Cs < Li
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Question

Arrange the following in order of increasing ionization energy: Li,Cs,K.
A)K < Li < Cs
B)Cs < K < Li
C)Li < Cs < K
D)Cs < Li < K
E)K < Cs < Li

Quizplus · Accepted Answer

Ionization energy increases as you move up a group and from left to right across a period in the periodic table. Since Li is in the second period, K in the fourth, and Cs in the sixth, the order of increasing ionization energy is Cs < K < Li.

Arrange the Following in Order of Increasing Ionization Energy: Li,Cs,K