⚛️ Atomic Structure — Intro#

Scope — Basic building blocks of atoms, simple models, and core vocabulary.

Key concepts#

• Atom — nucleus (protons, neutrons) + electrons.
• Atomic number — number of protons; defines the element.
• Isotope — same protons, different neutrons.

Seed Q&A triads#

• Q: What are the three main subatomic particles?
  A: Protons (positive, in nucleus), neutrons (neutral, in nucleus), electrons (negative, orbiting).

• Q: How does atomic number differ from mass number?
  A: Atomic number = protons; mass number = protons + neutrons.

• Q: Why do isotopes of an element behave similarly chemically?
  A: Chemical behavior depends mainly on electron configuration, which is unchanged by neutron count.

Quick references#

• Files in this folder: intro.md, intermediate.md, advanced.md.
• Use these Q&A seeds to expand examples or add short exercises.