1. The most electronegative element in periodic table is

2. Manometer is used for the determination of

3. The different forms of element are called

4. In a group the elements have almost same

5. The electro planting prevents

6. The KCI has the type of bonding

7. The matter exists in

8. When a covalent bound is formed  by two electron pair termed as a

9. The air is  a

10. Oxidation is the process of adding oxygen and removing

11. The sum of masses of all atoms in a molecule is called

12. Chemistry is the branch of science that deals with

13. ..............is homogenous mixture of two or more substances

14. When a covalent bound is formed  by a single electron pair termed as a

15. Chemical reactions involve migration of

16. The Atom is a Greek word

17. Steel is the alloy of

18. Neil Bhor mainly concentrated upon

19. Corrosion of metals is a .................reaction

20. The Atoms can exist freely in nature