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The Periodic Table - PowerPoint PPT Presentation

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The Periodic Table

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  1. The Periodic Table

  2. ELEMENTS 1 • There are more than 100 elements in the world. • The Periodic Table charts these elements.

  3. ELEMENTS 2 Each element is represented by a symbol

  4. CLASSIFICATION Elements can be thought of in a number of different ways: Solids / liquids / gases Metals / non-metals Natural / Synthetic Chemical properties

  5. SOLIDS / LIQUIDS / GASES Solids Liquids Gases

  6. metals non-metals METALS / NON-METALS

  7. NATURAL / SYNTHETIC • About 90 elements are found naturally on Earth • Elements 43, 61, 87 and those beyond 92 are man-made

  8. 1 2 3 4 5 6 7 0 CHEMICAL PROPERTIES • Elements organised into families according to chemical properties

  9. 1 2 3 4 5 6 7 0 Transition Metals Alkaline Earth Metals Halogens Alkali Metals Noble Gases GROUPS

  10. PERIODS • A PERIOD shows a graduation in chemical properties

  11. True or False False False False • 1.Calcium is a non-metallic element. • 2.The chemical symbol for calcium is C. • 3.Beryllium is in the same period as calcium. • 4.Group 7 in the periodic table is known as the Halogens. • 5. Group 0 in the periodic table is known as the Alkali Metals. • 6.Chlorine is in the same group as iodine. • 7.Nitrogen is in the same group as oxygen. • 8.Sodium has similar chemical properties to lithium. • 9. Iodine is a liquid at room temperature. • 10. Iron is an Alkali Metal. • 11.The melting-point of silicon is 1410C. • 12.Phosphorus is a liquid at 100 C. • 13.Bromine is a solid at –10 C. • 14.The melting point of the Alkaline Earth Metals decreases down the group. • 15.Plutonium is a naturally occurring element. True False True False True False False True False True True False