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Atomic number of an element is the number of
AProtons in the nucleus
BNeutrons inside the nucleus
CElectrons in the outer shell
DSub-shells filled in the atom
Answer & Solution
Correct answer: A. Protons in the nucleus
1. The chapter defines atomic number.
2. It equals the count of protons in the nucleus.
3. In a neutral atom it also equals the electron count.
4. So option A is correct.
_Source: Selina Concise Chemistry Class 8, Ch on Structure of Atom (Mistral OCR'd PDF), section on atomic number_
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