Question

The second ionisation energy is always higher than the first ionisation energy because the:

• A. ion becomes more stable attaining an octet or duplet configurations
• B. electron is more tightly bound to the nucleus in an ion
• C. electron is attracted more by the core electrons
• D. none of the above is the correct explanation

Answer 1

The correct option is B electron is more tightly bound to the nucleus in an ion

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.