Fill In The Blanks

1. Elements in the same group have similar   

2. The first noble gas in the periodic table is 

3. The element with atomic weight 14 is 

4. Which element has the atomic number 8?

5. The law that "the properties of elements are periodic functions of their atomic numbers" was given by

6. The Law of Octaves was given by

7. Mercury is a

8. Elements at the extreme right of the periodic table are

9. Magnesium has an atomic number of 

10. The least reactive elements of the periodic table are

11. The law that "the physical and chemical properties of elements are periodic functions of their atomic weights" was given by 

12. The vertical rows in a periodic table are called

13. The horizontal rows in a periodic table are called

14. The first element in the modern periodic table is

15. The element with atomic number 6 is

16. Which metal has atomic number 3?

17. Elements in the modern periodic table are arranged on the basis of their

18. Elements on the extreme left side of the periodic table are