Term 2 physics

• Matter


  Consists of pure substances and mixtures
• Pure substances


  • Elements
  • Compounds
• Mixtures


  • Homogenous
  • Heterogenous
• Elements


  • Copper
  • Silicon
• Compounds


  • Salt
  • Sugar
• Physical properties


  • Strength
  • Thermal conductivity
  • Chemical characteristics
• Physical properties have to do with how materials interact with other materials
• Electrical conductivity is a physical property
• Physical properties


  • Melting point
  • Boiling point
• Homogenous


  Cannot see individual components
• Heterogenous


  Can see individual components
• Phases of matter


  • Solid
  • Liquid
  • Gas
• Solids


  • Have a solid form
  • Are hard
  • Have a high density
  • Cannot be pressed together
  • Cannot flow
• Liquids


  • Do not have a fixed form
  • Are soft
  • Have a high density
  • Cannot be compressed
  • Can flow
• Gases


  • Do not have a fixed form
  • Are soft
  • Have a low density
  • Can be compressed
  • Can flow
• Atomic number is represented by z
• Mass number are represented by a
• Anions are negative ions
• Cations are positive ions
• Isotopes are atoms of the same element having the same number of protons but different number of neutrons
• Orbitals are probable regions in space where electrons with a specific energy corresponding to the orbital is found
• S orbitals have a spherical shape
• P orbitals have a double tear shape
• Orbitals can only have 2 electrons
• A single electron in a orbital is known as unpaired
• Ion is a atom with a charge