What two main features define an atom’s basic structure?

Answer	An atom has a nucleus (protons and neutrons) with electrons moving around it in shells. Those parts together determine identity, mass, and chemical behavior. WHY IT MATTERS: You need atomic basics to understand bonding, conductivity, and insulation. AIRCRAFT EXAMPLE: In aircraft wiring, electrons are the moving charge carriers in the conductor. MEMORY AID: N-E: Nucleus inside, Electrons outside. EASA TIP: Expect “which particle is where?” style questions.
Difficulty	Easy
Lesson	2.1.1 Nature of Matter
Module	Module 2.1
Tags	AtomsEasyModule 2.1