Question

Choose (E) Element (C)Compound (M) Mixture for the following_____1. Cannot be decomposed by chemical means_____2. Has a definite composition_____3. Pure substance composed of identical atoms_____4. Can be separated by physical means_____5. Can be separated by chemical means_____6. Magnesium_____7. water_____8. air_____9. salt water solution_____10. can be heterogeneous_____11. ammonia (NH3)_____12. composition may vary_____13a____13b____13c_____13d

Answer 1

1) Element

2) Compound

3) Element

4) Mixture

5) Compound

6) Element

7) Compound

8) Mixture

9) Mixture

10) Mixture

11) Compound

12) Mixture

Step-by-step explanation:

A compound refers to a combination of two or more atoms of the same or different elements Eg NH3.

A mixture refers to any combination of substances which do not chemically reavt together and are separable by physical methods.

An element refers to a substance that contains only one type of atom.