Answers

2016-03-25T21:38:05+05:30
The atomic radii decreases in moving from left to right along a period. This is due to the increase in nuclear charge which pulls the electrons closer and reduces the shells and thereby the size of an atom.
The atomic radii increases as we go down the group. This is because new shells gets added we go down the group. This increases the distance between the outermost shell and nucleus.
0