Question

FOR OUTER EC. 3S². 3P³. 5a¹ 6s² predict block group no. and period​

Answer 1

The block of an element corresponds to the type of orbital which receive the last electron. The group of an element is predicted from the number of electrons in the valence shell or/and penultimate shell as follows: a)For s block elements ,group number is equal to the number of valence electrons