Frequently Asked Question

The particulate theory of matter proposes that all matter is composed of tiny particles called atoms and molecules. Here's how evidence supports this theory:

Diffusion: Gases and liquids mix spontaneously. This is explained by particles moving and spreading out.
Expansion and Compression: Gases are easily compressed, suggesting particles are mostly empty space. Liquids and solids can expand slightly due to increased particle movement.
Brownian Motion: Tiny particles suspended in a fluid exhibit random, jiggling motion. This is explained by collisions with unseen particles.
States of Matter: The different states of matter (solid, liquid, gas) are explained by varying degrees of particle movement and spacing.
Chemical Reactions: Chemical reactions involve the rearrangement of atoms and molecules, providing direct evidence for their existence.
Crystal Structures: X-ray diffraction reveals the regular arrangement of atoms and molecules in crystalline solids.