Chemistry Atoms & Elements

• Matter is anything that has mass and takes up space.
• Solids hold their shape
• Liquid take the shape of any container
• Gases can fill container of any size
• Homogenous mixture is also known as Solution
• Hetrogenous mixture is also known as mechanical mixture, suspensions, and colloids
• • Physical properties are things like
  • Color Lustre
  • Melting Point
  • Boiling Point
  • Density
  • Solubility
  • Dustillity
  • Texture
  • Crystal Shape
  • Conductivity
  • Hardness
  • Maileability
• • Chemical Properties
  • Absorbs Heat
  • Combustible
  • Form a gas
  • Reacts with acid
  • React with water
  • Emits Heat
  • Emits Light
• Physical Change affects the apperance or form of matter but not the substance of the matter and has the same properties as the old one
• Chemical Change always forms something new with diffferent properties and is difficult to reverse
• signs a chemical change occured are color change emits heat emits light form a solid in a liquid difficult to reverse a new product has form
• Mixture: a substance made by mixing other substances together (Air)
• Pure Substance - A substance that is made up of only one element or compound. (Gold)
• Homogenous: Stays constant throughtout the mixture (Coffee)
• Heterogeneous: Changes throughout the mixture (Mixed Nuts)
• Compound: A substance that contains two or more elements. (Carbon Dioxide)
• Elements: A substance that cannot be broken down. (Uranium)
• Solution: Looks Like 1 substance (Salt Water)
• Mechanical Mixture: The different substances that make up the mixture are visible (Pizza)
• Suspensions: particles are held within the other to create a cloudy mixture that can be filtered (Flour & Water)