The first ionization energies of group 16 elements

The first ionization energies of the lighter elements of group 16 are ________ those of group 15 elements.

Why are the first ionization energies of the higher elements of group 16 lower than those of group 15 elements?

The first four ionization energies of an element are 191, 578, 872 , and 5962 "kca"l . The number of valence electrons in the element is.

The first five ionization energies of an element are 801,2428,3660,25030,32835 "in" "kJ"//"mol" . Then the element could be.

The first four ionization energies of an element are 191, 578, 872 , and 5962 "kcal . The number of valence electrons in the element is.

The first four ionization energies of an element are 738 kJ/mole, 1450 kJ/mol, 7700 kJ/mol and 11000 kJ/mol. Identify the periodic group to which this element belongs.