- Matter is Made up of Particles
- How Small Are These Particles of Matter?
- Physical nature of Matter:
- Matter is made up of very small particles. These small particles are called atoms.
- These particles cannot be seen by a naked eye, as they are too small in size.
- Atoms can be observed under electron microscope.
Particles of matter intermix on their own with each other. They do so by getting into the spaces between the particles. This intermixing of particles of two different types of matter on their own is called diffusion.
- Brownian Motion: The random or zig-zag movement of microscopic particles in a fluid, as a result of continuous bombardment from molecules of the surrounding medium, is known as Brownian motion. For example: Dust moves randomly because the random moving particles of air collide with dust particles.
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.