2.How many groups and periods are there in modern periodic table
3.How many elements are there in each period
4.what are the names of groups 1,2,15,16,17,18 th groups
5.why they are called so
6.what are 4 blocks present in modern table .why they are called so
7.why 18th group elements are called noble gases.give 3 reasons
8.what is only exception for octet in noble gases
9.name the elements present in 1st ,2nd ,17th and 18th group
10.Name the metalloids present in modern table
11.why atomic number is important in classifying elememts
12.what do you mean by lanthanides and actinides
13.why d block elements are called transition elements
No comments:
Post a Comment