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  • Atomic Structure
  • Which of the following elements contains two incomplete o...
Multiple choice

Which of the following elements contains two incomplete outermost shells?

  1. Calcium

  2. Bromine

  3. Iron

  4. Sulfur

  5. -

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The electronic configuration of iron is [Ar] 3d6 4s2. Hence, its two outermost shells are incomplete.

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