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Elements make compounds

Elements make compounds. Substances Miss Doig. Explosive experiment . Goggles, bench mat, tongs, bunsen, lighter and magnesium. CAREFULLY put magnesium in flame. Making a compound. What energy is being released? When magnesium is burned, energy is released as light.

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Elements make compounds

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  1. Elements make compounds Substances Miss Doig

  2. Explosive experiment • Goggles, bench mat, tongs, bunsen, lighter and magnesium. • CAREFULLY put magnesium in flame.

  3. Making a compound • What energy is being released? • When magnesium is burned, energy is released as light. • Is there a new substance being formed? • A new substance forms, it is white. • Is this new substance lighter or heavier? • -This new substance is heavier as there are two different elements in the substance, they are magnesium and oxygen.

  4. Elements make compounds • When elements join to make a compound, energy is released and a new substance is formed. • A word which means ‘energy released’ is exothermic. • What do you think endothermic means?

  5. Naming Compounds Substances

  6. Elements and symbols that you should know: • Oxygen • Fluorine • Neon • Magnesium • Aluminium • Silicon • Phosphorus O F Ne Mg Al Si P • Hydrogen • Helium • Lithium • Beryllium • Boron • Carbon • Nitrogen H He Li Be B C N

  7. This happens with the following elements: • H2 • N2 • O2 These elements always go around in pairs. For example, hydrogen looks like this: If two identical elements combine then the name doesn’t change. .e.g. oxygen + oxygen  oxygen

  8. Sodium + chlorine • Magnesium + fluorine When two elements join the name ends with ____ide e.g. Magnesium + oxygen magnesium oxide

  9. When three or more elements combine and one of them is oxygen the ending is _____ite or ________ate e.g. Copper + sulphur + oxygen Copper sulphate • Calcium + carbon + oxygen • Potassium + carbon + oxygen • Sodium + sulphur + oxygen

  10. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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