Chemistry
Grade-9
Easy

Question

How many electrons does potassium K contain?

  1. 19
  2. 39
  3. 20
  4. 40

hintHint:

For a neutral atom number of proton is equal to number of electron.

The correct answer is: 19


    • For a neutral atom number of proton is equal to number of electron.
    • Atomic number = number of protons.
    • Atomic number of potassium is 19, hence number of electron is 19.