Question

Select the factors that affect the ionisation energy of an element.

• A. Effective nuclear charge
• B. The number of neutrons in the nucleus
• C. The energy provided to the atom of an element
• D. Size of the atom

Answer 1

Answer: (A), (D)

The correct options are
A

Effective nuclear charge

D

Size of the atom

The factors of ionisation energy are the effective nuclear charge of the atom which is caused due to the attraction between the protons in the nucleus with the electrons within the atom. The other factor is the size of the atom, if the distance between the last electron and nucleus is large then the ionisation energy to remove an electron from the last electron is low.