Classifying matteer

• Pure substances?

  Made up of only one type of particle, each pure substance has a unique set of physical characteristics, can be divided into elements and compounds.
• Mixtures?

  • made of 2 or more pure substances
  • Divided into 4 different categories
• What are the 4 categories that mixtures can be put into?

  • mechanical mixture
  • solutions
  • suspensions
  • colloids
• Pure substances can be divided into two groups, what are they?

  elements and compounds
• What are the characteristics of an element?

  • found on the periodic table
  • Made of one type of atom
  • cannot be broken into smaller particles
• what is a compound?

  • combination of 2 or more elements in a fixes ratio
  • all the particles are the same but the atoms can be different
  • Energy can be used to separate the compound into their elements
• What are the characteristics of a solution?

  • Made up of two or more types of particles
  • Looks like one substance
  • Particles are evenly spread out evenly
• What is a mechanical mixture?

  Particles are not evenly spread out and more than one particle is visible. Ex trail mix
• Suspension: The components are in different states and cannot be easily separated. Ex mud in water
• What are the characteristic of a colloid?

  The particles are evenly dispersed and do not settle

  Cannot be separated by filtration

  Ex milk
• What are the characteristics of a homogenous mixture?

  Particles look the same throughout
• What are the characteristics of a heterogenous mixture?

  The particles look different throughout
• What is a physical property?

  A property that can be observes without forming a new substance
• What are some examples of physical properties?

  Colour, texture, smell crystal shape and density
• What are physical properties?

  Malleability, ductility, melting and boiling points, viscosity and solubility
• What are chemial properties?

  When a substance reacts with another when forming a new substance
• what are examples of chemical properties?

  reaction with acids, combustibility, reaction with water, reaction to heat, toxicity
• When matter changes to a solid liquid or gas what kind of change is that?

  physical change
• what is a physical change?

  When a substance changes form and not but not compositon
• What changes when a chemical change happens?

  A new substance is formed
• What are some examples that can tell of a chemical change is going on?

  change in colour ,odor, a change in temperature, formation of a gas and a precipitate.
• What is the law of conservation of mass?

  States that mass is not lost nor gain during and chemical reaction