Elements, Compounds and Mixtures

Elements, Compounds and Mixtures

1. Substances

   • Classifying Substances
     • Flexible and Rigid
     • Solid, Liquid and Gas
     • Transparent, Translucent and Opaque
     • Edible and Non-Edible
     • Elements and Non-Elements

2. Periodic Table

   • Symbols
     • Every element in the Periodic Table has a symbol.
   • There are periods and rows, to organise it.

3. Combining Elements

   • Reactions Between...
     • Hydrogen and Oxygen
       • Squeaky pop and some condensation.
         • Hydrogen + Oxygen -----> Water
     • Magnesium and Oxygen
       • Very bright white flame and there was a white solid left over.
         • Magnesium + Oxygen -----> Magnesium Oxide
     • Sodium and Chlorine
       • White solid,smoke and an orange-yellow flame.
         • Sodium + Chlorine -----> Sodium Chloride
     • Aluminium and Iodine
       • Purple smoke, orange-white spark and there was a white solid left over.
         • Aluminium + Iodine -----> Aluminium Iodine

4. Atoms,Elements and Compounds

   • Deciphering the Names of Compounds
     • Compounds of two elements have an -ide ending.
       • Magnesium and Oxygen makes Magnesium Oxide
     • Compounds made up of two elements plus oxygen usually end in -ate.
       • Copper, Sulphur and Oxygen makes Copper Sulphate
     • Some compounds have common names as well as chemical names.
       • Water, Salt and Chalk
   • Atoms Combining
     • Atoms of one type combine to form molecules of an element.
     • Atoms of two or more types combine to form molecules of a compound.
   • Elements and Atoms
     • A substance can not be an element and a compound at the same time because an element has not only got one type of atom but a compound has two types or more.
     • A substance can not be an atom and a compound at the same time because a single atom has only one type of atom but a compound has two or more types of different atoms.
     • Atom, Compound,Element and Molecule
   • Compounds
     • Working out the Formula for a Compound
       • The Crossover Rule
     • Compounds can react with other compounds
       • Sodium carbonate and Iron (II) Chloride
         • Dark green solid
       • Dilute Hydrochloric acid and Magnesium Carbonate solid
         • A white fizz and bubbled

5. Molecular Models

6. Metals/Non-Metals

   • Properties of Metals
     • Good Conductors of Electricity and Heat
     • Density
       • (Density=Mass/Weight)
     • High melting Point
     • Malleable
       • (Can be drawn out into wire)
     • Ductile
       • (Can be drawn out into wire)
     • Sonorous
       • (Rings when struck)
     • Magnetic
       • (Iron, cobalt and nickel)
     • Shiny
   • Properties of Non-Metals
     • Poor Conductors of Electricity and Heat
     • Dull
     • Low melting Point
     • Brittle
       • (If solid)