For Aluminium (Al) (atomic number: 13, mass number: 27), which one among the following statements is NOT correct?
- A. Number of electrons present in Al is 13
- B. Number of protons present in Al is 13
- C. Number of neutrons present in Al is 14
- D. The valency of Al is 2 ✓
Correct Answer: D. The valency of Al is 2
Explanation
Aluminium belongs to Group 13 of the periodic table and has 3 valence electrons, giving it a valency of 3, not 2.
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