2) Give reason:

1. Measurement has a great importance in chemistry

- Bec.it provide us with necessary information and quantitative data.

2. Chemistry is considered the center of most other sciences.

- Bec.it integrates with other branches of science.

3. Nano meter is an unusual measuring unit.

- Because extraordinary properties of the substance appear on this Scale.

4. Bucky ball (C₆₀) is used as a medicine carrier.

- Bec.it is a Hollow ball with an outer part resists the reaction inside the body

51. Nano tubes can be used to make space elevator.

- Bec. they are lighter and stronger than steel.