Question

Classify the following into elements, compounds and mixtures.

1. Sodium
2. Soil
3. Sugar solution
4. Silver
5. Calcium carbonate
6. Tin
7. Silicon
8. Coal
9. Air
10. Soap
11. Methane
12. Carbon dioxide
13. Blood

Answer 1

An element is a pure substances that cannot be broken down into simpler substances. It is the basic form of matter.
A compound is a substance which is composed of two or more elements. These elements are combined with one another in a fixed proportion.
Mixtures are constituted by more than one kind of pure form of matter. Elements and compounds are just mixed together to form a mixture.No new compound is formed.
Among the following:
Sodium, silver, tin and silicon are classified as elements.
Soil, sugar solution, coal, air and blood are classfied as mixtures.
Calcium carbonate, methane, carbon dioxide and soap are compounds.