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Chemistry Class # 9 Ch # 1 Quiz # 3

Welcome to your Chemistry Class # 9 Ch # 1 Quiz # 3

1. 

Average atomic mass is the weighted average of the atomic masses of the naturally occurring __________  of an element.

2. 

Mass number of Oxygen atom is

3. 

Mass number is equal to the sum of number of protons + number of ___________.

4. 

The number of proton present in the nucleus of an atom is called ____________

5. 

Atomic number is represented by _____

6. 

Examples of heterogeneous mixture is

7. 

A mixture having uniform composition throughout its mass is called

8. 

Example of homogeneous mixture is

9. 

Chemical formula of bleaching powder is

10. 

Chemical name of caustic soda is

11. 

The symbol of Gold is

12. 

__________ is generally known as the father of Chemistry.

13. 

Distillation is a chemical method which were introduced by _______

14. 

Atomic mass unit is the mass of 1/12 of the mass of any atom of

15. 

Number of naturally occurring elements are

16. 

The symbol of Fluorine is

17. 

Each element consists of only ______ kind of atoms.

18. 

The symbol of lead is

19. 

The chemical formula of Sodium nitrate is

20. 

A widely used example of mixture is __________