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Understanding Elements, Compounds, and Mixtures

Explore the basic units of matter - atoms, the pure substances known as elements made up of identical atoms, and compounds formed by chemically combining elements. Learn about mixtures, the differences between homogeneous and heterogeneous mixtures, and the Tyndall Effect. Test your knowledge with a quick quiz and reflection exercise.

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Understanding Elements, Compounds, and Mixtures

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  1. Elements Compounds and Mixtures

  2. Atom • Basic unit of matter • Structure= Protons + Electrons- Neutrons ± • Cannot break down further

  3. Atoms • Atoms are made up of electrons neutrons and protons.

  4. Elements The Most Basic Form of Matter • Elements are made up of identical atoms. Elements are pure substances that cannot broken down in to simpler substances. Gold

  5. Compound • Pure substance • 2+ atoms Chemically combined • Definite ratio • Can separate using Chemical means • Electrolysis • Combustion

  6. Made up of two or more elements in a specific or definite ratio. Compounds CH4 NH3

  7. H2 and 02 H H O O H H

  8. Chemically Combine to form H2O H H O O H H

  9. Mixture • Impure Substance • Physically combined • Indefinite ratio • Can separate using physical means • Filtration • Chromatography • Properties differences

  10. Mixture • Mixture is two or more substances that retain their identity.

  11. Tyndall Effect No! John Tyndall Yes!

  12. Tyndall= DON’T see light particles= colloid

  13. Mixture Homogeneous Heterogeneous Solution Colloid Suspension Visible particles Eventually settles in to layers Can’t see particles Never settles Never settles Yes the Tyndall Effect is observed Yes the Tyndall Effect is observed No Tyndall Effect

  14. Quick Quiz: which would be the element? Compound? Mixture?

  15. Reflection: DRAW and FILL IN Elements, Compounds, Mixtures Elements Compounds Mixtures Definition Definition Definition Ex. Ex. Hetero- Homo- Ex. Ex. Def. Def. Ex. Ex. Ex. Ex. HINT!!! May be on test

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