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Chemical Reactions TLC


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Chemical Reactions

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Chemical Reactions TLC

  1. 1. By Tenzin Liddy-Corlett
  2. 2. Elements and Atoms
  3. 3. What is an Element? <ul><li>An Element is a type of substance that is made from only one type of Atom. </li></ul><ul><li>E.g. The Element hydrogen is made up of atoms that have one single proton and one single electron. </li></ul><ul><li>If you change the number of protons an atom has, you are changing the type of element it is. </li></ul><ul><li>Scientists know that there are up to 118 different types of elements, but 9 are unnamed and there could be more to discover. </li></ul>The Element Gold.
  4. 4. Periodic Table The Periodic Table is used to show all the different types of atoms. It has all of the different types of Elements from the well-known elements Gold, Silver and Copper to some of the elements that you can only see for a few seconds in meitnerium, darmstadtium and ununquadium.
  5. 5. What is an Atom? <ul><li>An Atom is the basic elements of anything. </li></ul><ul><li>Atoms consist of one proton, one electron and one neutron </li></ul><ul><li>An Atom is the smallest substance that an element can be divided into </li></ul>The Atoms of a Crystal
  6. 6. Metals and Non-metals
  7. 7. Metals <ul><li>Metals are the densest of all elements </li></ul><ul><li>They are solid at room temperature </li></ul><ul><li>Metals are a good source of energy and heat </li></ul><ul><li>Metals can be shaped into different shapes and sizes which is why they are used in a lot of everyday products </li></ul><ul><li>Most elements are metals </li></ul>
  8. 8. Non-metals <ul><li>Non-metals are poor conductors of energy and heat </li></ul><ul><li>Even though they are a solid, they are brittle </li></ul><ul><li>You can’t change their shapes and sizes </li></ul><ul><li>They can be a solid, liquid or gas </li></ul>
  9. 9. Compounds
  10. 10. What are Compounds? <ul><li>Compounds contain two or more different elements combined in a chemical form to make a pure chemical substance </li></ul><ul><li>The simplest form of a compound is a molecule </li></ul><ul><li>Compounds can be held together by covalent bonds or ionic bonds or metallic bonds </li></ul>
  11. 11. Chemical Reactions
  12. 12. What are Chemical Reactions <ul><li>Chemical Reactions happen when two or more molecules interact and something happens </li></ul><ul><li>A chemical change must happen </li></ul><ul><li>You must start with one molecule and change it into another </li></ul>
  13. 13. Examples of Chemical Reactions <ul><li>When Hydrogen combines with oxygen they create water (H2O) </li></ul><ul><li>A steel garbage can rusting. The rusting happens because the iron comes into contact with oxygen and a reaction occurs </li></ul>
  14. 14. Things that can effect Reaction Rates <ul><li>Temperature </li></ul><ul><li>Concentrations of reactants </li></ul><ul><li>Catalysts </li></ul><ul><li>Surface area of a solid reactant </li></ul><ul><li>Pressure of gaseous reactants or products </li></ul>