1. HOMEWORK for 18.11.13 You will pick an element from the bowl. Your task is to create a poster for the element which will be used to build our own periodic table. The poster must be: 20 x 20cm Contain a picture of the element Give at least 1 use for the element Show the element’s Atomic Number

2. Think of 3 metals and say a property of each one

3. Now let’s look at non-metals

4. What are the properties of non- metals? How are they different to metals?

5. Think, pair, share What are the properties of non-metals? -Do not conduct heat -Do not conduct electricity -Low melting point -Low boiling point

6. Over to you... Challenge What tests could you carry out to decide if an element was a metal or a non-metal? What are semi-metals?

7. Physical Properties of Non-Metals 1. Physical State: Non-metals exist in all the three states at room temp, solid (carbon, phosphorus, and sulphur), liquid (bromine) and gas (oxygen, hydrogen, nitrogen). 2. Non-lustrous: Most of the non-metals are non-lustrous and dull such as sulphur, phosphorus. Graphite, diamond and iodine crystals are exceptions, as these shine. 3. Soft and Brittle: The solid non-metals are soft and brittle such as graphite, sulphur and iodine. Only diamond, a form of carbon is hard. In fact, diamond is the hardest substance.

8. Physical Properties of Non-Metals 4. Low-density, melting point and boiling point: Since most of the non-metals are gases at room temperature or are soft, their density is low, and therefore their melting and boiling points are also low. Diamond is an exception as it is hard and its density, melting and boiling points are high. It melts at 350˚C. 5. Non-metals are not malleable or ductile: Being soft and brittle, non-metals cannot be made into sheets or wires. 6. Bad conductors of electricity and heat: Non-metals do no possess free electrons to carry charge or heat and hence are poor conductors of electricity and heat. Graphite is the only non-metal which has free electrons in it and is a good conductor of electricity and heat.