1.Modern Periodic Table

and its Element

2.Properties of Atoms in periods and Groups

3. What is atomic radii 

4. what is ionic radii

5. Groups and periods of elements

6. properties of element moving from left to right in periods

7. properties of element moving from upper to lower in groups

8. Inactive Gassess.

9. why they are called as inactive gasses.

10. what is s block elements.

11. what is p block element and their properties

12. what is d block elements and their properties.

13. what is f block element and their properties

14. what are radioactive elements

15. what are isotopes and isobars.

16. what is atomic redii of isotopes and isobars

17. what are properties of isotopes and isobars.

18. charectristics of s p d f block elements.

19. difference between s p d f block elements

20. why hydrogen have taken place in 1st and 7th group both.

21. what is the uses of inactive gasses.

22. how many elements are present in modern periodic table.