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Which of the following statements are correct? *• Helium has the highest first ionisation enthalpy in the periodic table• Mercury and bromine are liquids at room temperature• In any period, atomic radius of alkali metal is the highest• all​

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HERE IS YOUR ANSWER FRIEND;

iii MERCURY and bromine are LIQUIDS at room TEMPERATURE. iv In any period atomic radius of alkali metal is the highest. Assertion: Of the elements , helium has the highest value of first ionisation enthalpy. Reason : Helium has the most positive electron gain enthalpy of all the elements.

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