So small () that the most powerful microscopes cannot detect them. A: are these particles B: were these particles C: these particles are D: these particles were

The Tyndall effect is the result of scattering of light by sol particles.

Colligative properties do not depend on nature of solute particles.

Urban haze, the scattering or absorption of light, is caused by fine particles.

下列穿透能力最强的粒子是（ ）？ A: β-particles B: α-particles C: Microwave D: X-ray

Colligative properties do not depend on nature of solute particles. A: 正确 B: 错误

The amount of scattering that occurs depends on the ( ). A: Size of particles B: Radiation wavelength C: Quantity of particles D: How deep the energy passes through the atmosphere

Which of the following is the bulk volume of the powder？ A: True volume B: Void volume between particles C: Void volume in particles D: The sum of the above three

What isthe essential characteristic of colloid? A: Tyndall effect B: Brownian motion C: Colloidal particles size ranges from1nmto 100nm D: colloidal particles charged

The natural atmosphere that we breathe contains not only gaseous constituents but also large numbers of liquid and solid particles.