Question

explain the trends in electronic configuration for elements in a period and in a group please answer me or is urgent​ please please please please please please please please please

Answer 1

Answer:

when we move top to bottom in a group the no. of shell increasing as the atomic radii increases but the valence electron of the elements remain same in the same group. while when we move in along the period there will be no change seems in the shell. That means the atomic shell remain same but the no. of valence electron keep increasing due increasing of effective nuclear charge.