Multiple choice

The atomic number of an element signifies the number of

  1. protons in the nucleus

  2. electrons in the nucleus

  3. electrons in the extranucleur part

  4. protons in the extranucleur part

  5. electrons and protons in the nucleur part

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

This is the correct answer as the atomic number of an element signifies the number of protons.