Question

define IP1 and IP2. why second IP is greater than first IP

Answer 1

In first ionisation energy, we remove electron from a neutral atom but for second ionisation we have to remove electron from a positive atom, where electron are more tightly bounded due to increased attraction force so second ionisation energy is high relative to first IP.

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Answer 2

Answer:

In first ionisation energy, we remove electron from a neutral atom but for second ionisation we have to remove electron from a positive atom, where electron are more tightly bounded due to increased attraction force so second ionisation energy is high relative to first IP.