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# Which of the following represents the correct order of increasing first ionization enthalpy for

Question:

Which of the following represents the correct order of increasing first ionization enthalpy for

$\mathrm{Ca}, \mathrm{Ba}, \mathrm{S}$, Se and Ar ?

1. $\mathrm{Ca}<\mathrm{S}<\mathrm{Ba}<\mathrm{Se}<\mathrm{Ar}$

2. $\mathrm{S}<\mathrm{Se}<\mathrm{Ca}<\mathrm{Ba}<\mathrm{Ar}$

3. $\mathrm{Ba}<\mathrm{Ca}<\mathrm{Se}<\mathrm{S}<\mathrm{Ar}$

4. $\mathrm{Ca}<\mathrm{Ba} \mathrm{S}<\mathrm{Se}<\mathrm{Ar}$

Correct Option: , 3

Solution:

Solution Not Required