Form 4 chapter 2

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Form 4 chapter 2

  1. 1. Chapter 2 Matter
  2. 2. Atoms• Smallest particle of an element
  3. 3. Molecules• Two or more atoms bonded together COVALENTLY
  4. 4. Ion• Positively charged or negatively charged
  5. 5. Elements• Consists of only one atoms
  6. 6. Sulphur is an element !
  7. 7. • Consists of ALL the same ATOMS• All S atoms
  8. 8. How do we know ?• Atomic Force Microscopy (AFM)
  9. 9. Diamond• Consists of ALL the same ATOMS• All C atoms
  10. 10. Compounds• Consists of only two or more different atoms BONDED CHEMICALLY TOGETHER
  11. 11. Sodium Chloride (NaCl)
  12. 12. How do we know ?• Surface Electron Tunneling Microscope
  13. 13. • NaCl a compound !
  14. 14. Sulphur hexafluoride• Contains S and F
  15. 15. NanoKids
  16. 16. Kinetic Theory of Matter FAME !!
  17. 17. State Solid Liquid GasArrangementMovement Vibrate and Rotate Packed closely but no Very far from one and FIXED position in order another in random arrangementForces of Attraction Strong Medium WeakEnergy Content Low Medium High
  18. 18. Rates of Diffusion
  19. 19. Napthalene• Has Van Der Waals attraction
  20. 20. A to B• Solid temperature increase
  21. 21. B to C• Energy absorbed used to break bonds• Breaking bonds needs ENERGY !
  22. 22. C to D• Liquid temperature increase
  23. 23. D to E• Boiling !!!
  24. 24. E to F• Gas temperature increase
  25. 25. Bond formation• Bond formation needs energy !Bond breaking: Absorb EnergyBond formation: Release Energy
  26. 26. Bond formation ReleasesHeat into water
  27. 27. BUT…. Water ReleasesHeat into surroundings

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