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Per NCERT §3.7.1(b), what does ISOELECTRONIC mean, and which example does the textbook give?
ASpecies with the same number of electrons — e.g. O²⁻, F⁻, Na⁺, Mg²⁺ all have 10 electrons
BSpecies with the same mass
CSpecies with the same proton count
DSpecies with the same colour
Answer & Solution
Correct answer: A. Species with the same number of electrons — e.g. O²⁻, F⁻, Na⁺, Mg²⁺ all have 10 electrons
Per NCERT §3.7.1(b), isoelectronic = identical electron count. O²⁻/F⁻/Na⁺/Mg²⁺ all have 10 e⁻ but different Z.
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