Answers

2015-12-31T19:01:23+05:30
Because the electrons are added in the same shell while we go left to right and hence the atomic radii decreases and the nuclear charge increases. Because of increased nuclear charge the size of atom decreases.  
hope this help u .. 
0
2015-12-31T20:07:46+05:30
As the atomic radii size increases nuclear charge decreases
0
plaza Mark as brainless if it helps
plzzz