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Structure of Atom question

2003 · Shift 0 · Q57
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Structure of Atom question

2003 · Shift 0 · Q57

JEE MainChemistryStructure of AtomMCQ+4 / −1
Which one of the following groupings represents a collection of isoelectronic species? (At. nos. : Cs : 55, Br : 35)
  1. A
    N3−N_3^-N3−​, F−F^-F−, Na+Na^+Na+
  2. B
    BeBeBe, Al3+Al^{3+}Al3+, Cl−Cl^-Cl−
  3. C
    Ca2+Ca^{2+}Ca2+, Cs+Cs^+Cs+, BrBrBr
  4. D
    Na+Na^+Na+, Ca2+Ca^{2+}Ca2+, Mg2+Mg^{2+}Mg2+
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