Chemistry

• Chemistry


  A scientific study about properties and behavior of matter
• Chemistry


  The study of matter and its interactions with other matter and energy
• Matter


  Anything that has mass and takes up space
• Air

  Matter that is so thin compared to other matter, we sometimes forget it has mass and takes up space
• Things that are not matter include thoughts, ideas, emotions, and hopes
• Physical properties


  Characteristics that describe matter as it exists
• Physical properties


  • Shape
  • Color
  • Size
  • Temperature
• Phase (or state) of matter


  An important physical property
• Fundamental phases of matter

  • Solid
  • Liquid
  • Gas
• Chemical properties


  Characteristics of matter that describe how matter changes form in the presence of other matter
• Chemical properties


  • Does a sample of matter burn?
  • Does it behave violently when put in water?
• Physical change

  A change that occurs when a sample of matter changes one or more of its physical properties
• Physical change


  • A solid may melt
  • Alcohol in a thermometer may change volume as the temperature changes
• A physical change does not affect the chemical composition of matter
• Chemical change

  The process of demonstrating a chemical property
• Chemical change


  • The burning of a match
• Chemical changes are frequently accompanied by physical changes, as the new matter will likely have different physical properties from the original matter