First four ionisation energy values of an element are 191, 578, 872 and 5972 K.Cals The number of valence electrons in the element is

First four ionisation energy values of an element are 191, 578, 872 an

1.	First four ionisation energy values of an element are 191, 578, 872 and 5972 K.Cals The number of valence electrons in the element is
Answer» 4 3 1 2 Answer :B