Question

34. Explain the general trend for atomic radius going across a period; to the right. 35. Explain the general trend in atomic radius going down a group.

Answer 1

The distance between center of nucleus to outer most energy level electron cloud of an atom is known as atomic radius

→ Aronic radius :- 4 The distance between centere of nucleous to outermost energy level o cloud of an atom is known as Alamic Radious. * It is difficult to Isolate Individual atan and é cloud of an atan is a Imaginaly arrangemen That means te. There is no definite boundary for an atam hence A.R expresed in other Terms based as nakule of bonding (crestal Radi, covalent Radi, vanderwall Radi) across a period, moving actos The period as The Atomic Number Increases Incoming electra enter Into same ensigy level, which is atracted by Increased in nuclead change Result decrease in size. Ther for Left to righ Atomic Radius decreases. or Left to right in apelion 35 In group" acros The group. Hoving down the group as Atomic number Increases (1) Incrising electron entere into new energy level, which (1) Increases distance between nucleous to outer most electrons cloud There for top to bolay (down The group) in a group. Aromic Radixs Increased.