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Chemical Reactions

Chemical Reactions

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  • 1. ELEMENTS, Atoms, Compounds and Molecules
    By Terry Gunning
  • 2. Elements
    Elements are made up of atoms.
    All the elements are listed on the periodic table.
    Elements are purely one substance.
  • 3. Atoms
    An atom is made of protons, neutrons and electrons.
    Atoms make up elements.
    The amount of protons, neutrons and electrons defines what element it is.
  • 4. Metals and Non Metals
    A metal has high electrical and thermal conductivity. Metals are usually shiny, solid at room temperature, ductile and malleable. Metals normally have 1-3 electrons in their outer shell.
    Non Metals are poor conductors of heat and electricity. They can be solid, liquid or gas at room temperature. Non metals have 4-8 electrons in their outer shell.
  • 5. Periodic Table
    The periodic table shows all the elements and their atomic number.
  • 6. Compounds
    A compound is a substance consisting of two or more different elements that can be separated by a chemical reaction. Water is a compound made up of two hydrogen and one oxygen atom.
  • 7. Chemical Reactions
    A chemical reaction is when two or more elements interact and create a new compound.
    Some chemical reactions are spontaneous and some are non-spontaneous needing input from some sort of energy (electricity, heat or light).
  • 8. Identifying Chemical Reactions
    A chemical reaction is when two elements combine.
    Some times a bye product can be created like a gas.
  • 9. Chemical and Physical Changes
    A chemical change is when the substance is changed chemically like metal rusting.
    A physical change is when a substance changes shape or form.
  • 10. Reaction Rate and Factors Affecting It
    Reaction rate can be accelerated with heat and decreased in the cold.
  • 11. THE END