Question

how to remember classification of perodic table any logic to mind it easily

Answer 1

You just read 5 elements everyday according to order with everything(including valency and no. of electrons in orbit.)it would be easier for you at the time of exams.It may also remove your stress of reading periodic classification of elements before exams.Hope this helps you for preparation. 

Answer 2

in school level u r not going to use all the elements . just read out which is important .if u really want know means ,one way is to separate the elements like innert gas radioactive elements this r the easy 1 to remember remain g  u have to mug up