The electronic configuration of H is 1s1 It has one valence electron like the ist group and It gets octet configuration [He] when it accepts one electron like the Group 7 elements (Halogens) Hence Hydrogen is like group 1 and group 7. Solution The electronic configuration of H is 1s1 It has one valence electron like the ist group and It gets octet configuration [He] when it accepts one electron like the Group 7 elements (Halogens) Hence Hydrogen is like group 1 and group 7..