Ionisation Energy Question 8

Give the group number for the following elements having these successive first ionisation energies.

1. 1. 799 2420 3660 25040 32850 – Group 3
   2. 1000 2260 3390 4540 6990 8790 27100 31700 – Group 6
   3. 736 1450 3740 7740 18000 21700 25600 29400 – Group 4