Assertion (A): The atomic and ionic radii generally decrease towards right in a period.
Reason (R): The ionisation enthalpy increases on moving towards left in a period.
Answer
- As we move from left to right in a period, the ionic and atomic radii decrease .
- Ionization enthalpy is the energy required to remove an electron from an atom . As we move from left to right in a period, as the atomic size decreases, and ionization enthalpy increases .
Thus,
- Assertion is true.
- Reason is false.
Therefore, the correct option is (c) Assertion is true but Reason is false
