Multiple choice

Elements with which of the following electronic configurations will show periodicity in their properties?

  1. 2, 5 and 2, 8, 1

  2. 2, 7 and 2, 8, 18, 7

  3. 2, 4 and 2, 8, 5

  4. 2, 8, 4 and 2, 8, 5

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

The elements having the same number of electrons in the last valence shell show periodicity in their properties.