Question

1. what is diffusion?

Explanation:

Diffusion is the process by which particles (atoms, molecules, ions) move from an area of higher concentration to an area of lower concentration, driven by the random thermal motion (Brownian motion) of the particles. This process occurs to achieve a state of uniform concentration (equilibrium) and can happen in gases, liquids, and solids. For example, when a drop of ink is added to water, the ink particles diffuse throughout the water until the color is evenly distributed. In biological systems, diffusion is important for processes like the movement of oxygen and carbon dioxide across cell membranes.

Answer:

Diffusion is the spontaneous movement of particles (atoms, molecules, ions) from a region of higher concentration to a region of lower concentration, driven by random thermal motion, to achieve uniform concentration (equilibrium), occurring in gases, liquids, and solids (e.g., ink spreading in water, gas exchange in cells).