Correct statement/s among the following with respect to ionization energy (IE) is/are:
(i) IE1 for sodium is less than that of potassium.
(ii) IE2 of magnesium is lower than that of calcium.
(iii) IE1 of phosphorus is greater than that of sulfur.
(iv) IE1 of chlorine is greater than that of bromine.
1
(i) and (ii)
2
(iii) and (iv)
3
(i) and (iv)
4
(i) and (iii)