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Unit 2 Matter

Unit 2 Matter . Subatomic Particles. Atomic Number. Isotopes. Mass Number. Average Atomic Mass. States of Matter. Kinetic energy of each state. Properties: Arrangement of Particles Attractive forces between particles : Kinetic energy of particles: Particle Motion:.

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Unit 2 Matter

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  1. Unit 2 Matter

  2. Subatomic Particles

  3. Atomic Number

  4. Isotopes

  5. Mass Number

  6. Average Atomic Mass

  7. States of Matter

  8. Kinetic energy of each state Properties: Arrangement of Particles Attractive forces between particles: Kinetic energy of particles: Particle Motion: • Solid: • Orderly • 2) Closely Packed • Very Strong • Very Low • Vibrate and rotate • About a fixed position Liquid: 1) Disorderly 2) Less closely packed than a solid. Strong Low Slide over each other Gas: 1) Disorderly 2) Very far apart Very weak High Move about at great speeds.

  9. Changes in State

  10. Thermal Energy/Heat/Temperature • Thermal Energy – the total amount of kinetic and potential energy of an object. • Heat – the movement of thermal energy from hot to cold. Heat always moves from hot to cold. • Temperature – the average kinetic energy of all the particles in an object.

  11. Physical Properties

  12. Physical vs. Chemical Properties

  13. Physical Change vs. Chemical Change Change in identity of the substance - rust Change in shape

  14. Physical Changes

  15. Chemical Changes

  16. Evidence of Chemical Change Energy change precipitate Gas formed Color change

  17. Exothermic vs. Endothermic Exothermic reaction - heat is released, becomes hot Endothermic reaction - heat is absorbed, becomes cold

  18. Law of Conservation of Mass

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