What is the atomic number of aluminium?

JAMB Chemistry 2023 61 views

What is the atomic number of aluminium?

  1. 12
  2. 14
  3. 26
  4. 13 ✓

Explanation

Aluminum has atomic number 13. This means 13 protons in its nucleus. It also has 13 electrons in a neutral atom.

Atomic number identifies each element uniquely. Magnesium is 12. Silicon is 14. Iron is 26.

Remember: Atomic number equals proton count. It determines the element’s position in the periodic table.

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