Question

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​

Answer 1

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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