Question

${IE}_2$ for an element are invariably higher than ${IE}_1$ because:

• A. the size of cation is smaller than its atom
• B. it is difficult to remove 'e' from cation
• C. ionisation energy is endothermic
• D. all of the above

Answer 1

Answer: (A), (B)

it is difficult to remove 'e' from cation
the size of cation is smaller than its atom

${IE}_2$ for an element are invariably higher than ${IE}_1$ because the size of cation is smaller than its atom and it is difficult to remove 'e' from cation.
Second ionization energy is greater than first ionization energy for an element as it is harder to remove a negatively charged electron from the positively charged ion.