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1 1 KS3 SCIENCE - CHEMISTRY KS3 SCIENCE - CHEMISTRY Metals

2 2 PROPERTIES OF METALS

3 3 Li Na K K Rb Cs Be Mg Ca Ba Sc Y Y La Ti Zr Hf V V Nb Ta Cr Mo W W Mn Tc Re Fe Ru Os Co Rh Ir Ni Pd Pt Cu Ag Au Zn Cd Hg Al Ga In Tl Ge Sn Pb Sb Bi Po Most of the Elements in the Periodic Table are Metals Most of the Elements in the Periodic Table are Metals

4 4 PROPERTIES OF METALS Metals are good Conductors of Heat Metals are good Conductors of Heat The heat makes Molecules vibrate faster at the hot end The heat makes Molecules vibrate faster at the hot end

5 5 PROPERTIES OF METALS Metals are good Conductors of Heat Metals are good Conductors of Heat This vibration is then passed along to neighbouring molecules This vibration is then passed along to neighbouring molecules

6 6 PROPERTIES OF METALS Metals are good Conductors of Heat Metals are good Conductors of Heat So the heat gradually moves along the rod So the heat gradually moves along the rod

7 7 PROPERTIES OF METALS Metals are also good conductors of Electricity, which is a flow of negatively Charged Electrons Metals are also good conductors of Electricity, which is a flow of negatively Charged Electrons -VE +VE

8 8 PROPERTIES OF METALS Metals are also good conductors of Electricity, which is a flow of negatively Charged Electrons Metals are also good conductors of Electricity, which is a flow of negatively Charged Electrons This is why metal wire is used in electrical circuits This is why metal wire is used in electrical circuits

9 9 PROPERTIES OF METALS Metals have a high Density - atoms are tightly packed, and this makes them very tough Metals have a high Density - atoms are tightly packed, and this makes them very tough

10 PROPERTIES OF METALS But metals are also Malleable (can be shaped) and Ductile (can be drawn out into wire) But metals are also Malleable (can be shaped) and Ductile (can be drawn out into wire)

11 PROPERTIES OF METALS Metals are shiny when cut or polished and they are Sonorous (make a noise) Metals are shiny when cut or polished and they are Sonorous (make a noise)

12 PROPERTIES OF METALS Metals can be mixed together to form Alloys with a mixture of the properties of the parts Metals can be mixed together to form Alloys with a mixture of the properties of the parts

13 PROPERTIES OF METALS Some metals are Magnetic, but only Iron, Nickel, Cobalt and some of their alloys (e.g. Steel) Some metals are Magnetic, but only Iron, Nickel, Cobalt and some of their alloys (e.g. Steel)

14 UNUSUAL METALS

15 UNUSUAL METALS Metals usually have a very high Melting point and and extremely high Boiling point because bonds between Atoms are very strong Metals usually have a very high Melting point and extremely high Boiling point because bonds between Atoms are very strong This is why metal is used for things like pots and pans This is why metal is used for things like pots and pans

16 UNUSUAL METALS However, Mercury is an exception, and it is liquid at room temperature However, Mercury is an exception, and it is liquid at room temperature As liquids expand more than solids, this makes it useful for thermometers As liquids expand more than solids, this makes it useful for thermometers

17 UNUSUAL METALS Sodium is another unusual metal Sodium is another unusual metal It has a very low density, and so can easily be cut and will even float on water It has a very low density, and so can easily be cut and will even float on water

18 UNUSUAL METALS Sodium is also highly reactive, and unlike most metals reacts very vigorously with water Sodium is also highly reactive, and unlike most metals reacts very vigorously with water