Multiple choice

Which of the following ions has/have noble gas electron configuration(s) similar to xenon? a. Sc3+ b. Ti4+ c. Ce4+ d. Ba2+

  1. Only a

  2. Both a and b

  3. Both b and c

  4. Both c and d

  5. Only d
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

58Ce: [Xe] 4f1 5d1 6s2 Ce4+ ion is formed by losing 4 electrons from valence shell of Ce. Hence it has noble gas electronic configuration similar to Xe.

56Ba: [Xe] 6s2 Ba2+ ion is formed by losing 2 electrons from valence shell of Ba. Hence, it has noble gas electronic configuration similar to Xe.

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