on the basis of electronic structure, how will you select
a) 1st element in a period
b) terminating member in a period
c) chemically similar elements
a)The element having a single electron in its outermost shell as per electronic structure will be the 1st element of a period.
b) The element with a competely filled last shell will be the terminating member of a period.
c)Chemically similar element generally have simlar configuations of the valence shell.