Examine the following set of ionization energy values for a certain element. How many valence electrons does an atom of the neutral element possess?
Ionization step Ionization energy
(kJ/mol)
Ei1 1012
Ei2 1903
Ei3 2912
Ei4 4956
Ei5 6273
Ei6 22233
Ei7 25997
Enter your answer numerically as an integer........