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NVAEasyJEE Main 2024 · 27 January, Shift 2Electronic Configuration

Chemistry Question from JEE Main 2024 · 27 January, Shift 2

Total number of ions from the following with noble gas configuration is:

Sr2+ (Z=38)\mathrm{Sr^{2+}}\,(Z=38), Cs+ (Z=55)\mathrm{Cs^{+}}\,(Z=55), La2+ (Z=57)\mathrm{La^{2+}}\,(Z=57), Pb2+ (Z=82)\mathrm{Pb^{2+}}\,(Z=82), Yb2+ (Z=70)\mathrm{Yb^{2+}}\,(Z=70) and Fe2+ (Z=26)\mathrm{Fe^{2+}}\,(Z=26)

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