Multiple choice

Which of the following elements has the electronic configuration 2, 8, 8, 1?

  1. Sodium

  2. Potassium

  3. Scandium

  4. Calcium

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

The correct answer is option (2). Potassium has atomic number 19. Its electronic configuration is 2, 8, 8, 1.