Atomic Foundation of Matter

Matter is built from atoms, the smallest units that retain the identity of an element. This topic introduces the atomic foundation of matter — what atoms are, what they are made of, and how their structure explains the p…

• All matter is made of atoms, the smallest particles that retain an element's identity.
• An atom has a dense central nucleus containing protons and neutrons.
• Electrons (negative charge) occupy the space around the nucleus.

Full explanation, worked examples & memory tricks in the app