Multiple choice general knowledge science & technology

Number of atoms in outer most shell for halogens?

  1. 4

  2. 7

  3. 6

  4. 2

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

Halogens belong to Group 17 of the periodic table. They have a valence shell configuration of ns^2 np^5, totaling 7 electrons in their outermost shell, making them highly reactive as they seek one more electron to complete an octet.