Chemistry·Matter · Bonding · NSSCO 2.4.1
Atoms, molecules & ions — elements, mixtures & compounds
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Everything is built from just three kinds of particle: atoms, molecules and ions. Learn the difference between an element, a compound and a mixture, how particles pack into lattices, and why alloys like brass, bronze and steel are mixtures — not compounds.
What you'll learn in this lesson
By the end you should be able to (NSSCO Chemistry 2.4.1):
- Explain that atoms, molecules and ions are the building blocks of all material
- Distinguish between elements, mixtures and compounds
- Explain that atoms combine to form molecules or (compound) ions
- Explain that atoms, ions and molecules can form crystal lattices, either molecular or giant
- Explain that giant lattices can be ionic, metallic or covalent
- Describe alloys such as brass, bronze and steel as mixtures of a metal with other metals or carbon
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