Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling scale, the electronegativity values of N and Cl are not the same. C. Ar , K ^ + , Cl ^ - , Ca ^ 2+ , and S ^ 2- are all isoelectronic species. D. The correct or

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Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling scale, the electronegativity values of N and Cl are not the same. C. Ar , K ^ + , Cl ^ - , Ca ^ 2+ , and S ^ 2- are all isoelectronic species. D. The correct order of the first ionization enthalpies of Na , Mg , Al , and Si is Si Al Mg Na . E. The atomic radius of Cs is greater than that of Li and Rb . Choose the correct answer from the options given below

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Correct answer: B. C and E only

(C) Ca ^ 2+ , K ^ + , Ar , Cl ^ - , S ^ 2- all species have 18 electrons that's why these are isoelectronic species. (E) Radius order Cs Rb K Na Li

NEET Chemistry Question (2025) — Solution

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