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Which of the following statements are correct?

(i) Helium has the highest first ionisation enthalpy in the periodic table.

(ii) Chlorine has less negative electron gain enthalpy than fluorine.

(iii) Mercury and bromine are liquids at room temperature.

(iv) In any period, the atomic radius of alkali metal is the highest.

Answers (1)

The answer is the option (i), (iii) and (iv)

Explanation: Helium is the smallest noble gas, and that is the reason why it has the highest ionisation enthalpy.

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