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hy ionisation enthalpy of H is more than Na

Posted by Piyush Nayak 7 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Jaya Verma 7 years, 10 months ago

Ionisation enthalpy decreases down the group. That's why H has more ionisation enthalpy than Na (as we know H is placed before Na in group 1 i.e alkali metals).

Dhruv Bansal 7 years, 10 months ago

Hydrogen have more ionisation enthalpy than Sodium because the size of Hydrogen is comparitively small than Sodium so there needs greater ionisation enthalpy for the break down of Hydrogen atom than Sodium atom.

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