The first three successive ionisation energies of an element X are 520, 7297 and 11810 kJ `mol^(-1)` respectively. The element X belongs to

The first three successive ionisation energies of an element Y are 900, 1757 and 14850 kJ mol^(-1) respectively. The element Y belongs to

The five successive ionisation energies energies of an element 'X' are 800, 1427, 2658, 25024 and 32824 "KJ mole"^(-1) respectively . The valency of 'X' is :

The five successive ionisation energies energies of an element 'X' are 800, 1427, 2658, 25024 and 32824 "KJ mole"^(-1) respectively . The valency of 'X' is :

The five successive energies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol^(-1) respectively. The number of valence electron is

The five successive energies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol^(-1) respectively. The number of valence electron is

Five successive ionisation enthalpies of an element are 800, 2427, 3638, 25024 & 32824kJ*mol^(-1) respectively. The number of valence electrons of the element is-