Atoms, Elements, Compounds and Mixtures

• Atoms are the building blocks of everything and are represented by symbols in the periodic table.
• Chemical reactions can be displayed as symbol or word equations.
• A mixture consists of two or more different substances that are not chemically joined together.
• The periodic table is organized into groups and periods.
• An element is a substance made up of one type of atom.
• A compound is a substance that contains two or more elements chemically combined.
• Mixtures can be separated by a number of methods such as filtration, crystalization, distillation and chromatography.
• Periods are horizontal rows.
• Groups are vertical columns.
• Element

  
• Compounds

  
• Mixture

  
• Which is which?

  A) Elements

  B) Compounds

  C) Mixtures

  
• Label

  A) C

  B) D

  C) E

  D) F

  E) A

  F) B