Chemistry topic 1

• What is a compound?

  Atoms of different elements that are combined in fixed ratios. Different properties from their component elements.
• What is a mixture?

  More than one element or compound that are not chemically bonded together. Retain their individual properties.
• Homogeneous

  A mixture where you can not see the difference.
• Heterogeneous

  A mixture where you can see the difference.
• C

  Carbon
• F


  Fluorine
• K

  Pottasium
• Ca

  Calcium
• Hg

  Mercury
• W

  Tungsten
• NaCl

  Sodium Chloride
• K2O

  Pottasium Oxide
• CaBr2

  Calcium Bromide
• Water

  H2O
• Glucose

  C6H12O6
• Ammonium Sulfate

  (NH4)2SO4
• % atom economy =

  mass of desired product / total mass of products x 100
• What happens to the temperature when going from Solid to Gas

  Temperature increases
• What happens to kinetic energy of particles when going from Solid to Gas

  kinetic energy of particles increases
• Properties of the solid state

  particles closely packed. inter-particle forces are strong, particles vibrate in position. fixed shape. fixed volume.
• Properties of the liquid state

  particles more spaced. inter-particle forces are weaker, particles can slide over each other. no fixed shape. fixed volume.
• Properties of the gas state

  particles spread out. inter-particle forces are insignificant, particles move freely. no fixed shape. no fixed volume.
• Diffusion

  particles of a substance become evenly distributed, as a result of their

  random movements.
• state symbol for a solid

  (s)
• state symbol for a liquid

  (l)
• state symbol for an aqueous solution

  (aq)
• state symbol for a gas

  (g)
• solid to gas

  sublimation
• gas to solid

  deposition
• solid to liquid

  melting
• liquid to solid

  freezing
• liquid to gas

  evaporating / boiling
• gas to liquid

  condensing