Atomic Foundations of Matter

This topic introduces the atomic foundations of matter, explaining that all matter is composed of atoms and how atomic structure underpins the properties of substances. It builds the conceptual base for understanding ele…

• Matter is anything that has mass and occupies space.
• All matter is composed of atoms, the smallest particles that retain an element's identity.
• Atoms are about $10^{-10}$ metres in diameter — extremely small.

Full explanation, worked examples & memory tricks in the app