Question

*Which of the following has lowest ionization enthalpy?*

1️⃣ Na
2️⃣ F
3️⃣ O
4️⃣ Ne​

Answer 1

Answer:

By losing one electron, sulphur can attain the half filled state and hence achieve greater stability. Hence, sulphur has the least ionization enthalpy in this case.

Answer 2

Answer:

Sulphur

Na

Sulphur has the maximum atomic radius when compared to the other three atoms. Also the electronic configuration of sulphur is [Ne]3s23p4. By losing one electron, sulphur can attain the half filled state and hence achieve greater stability. Hence, sulphur has the least ionization enthalpy in this case.