Assertion: Helium has the highest value of ionisation energy among all the elements known. Reason: Helium has the highest value of electron affinity among all the elements known.

Question

Assertion: Helium has the highest value of ionisation energy among all the elements known. Reason: Helium has the highest value of electron affinity among all the elements known. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

He contains fully filled 1 s2 orbital which has more penetrating effect and is very close to the nucleus and hence has higher value of ionisation energy.

Q. Assertion : Helium has the highest value of ionisation energy among all the elements known.
Reason : Helium has the highest value of electron affinity among all the elements known.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

He contains fully filled $1 s^{2}$ orbital which has more penetrating effect and is very close to the nucleus and hence has higher value of ionisation energy.

Q. Assertion : Helium has the highest value of ionisation energy among all the elements known. Reason : Helium has the highest value of electron affinity among all the elements known.