3 • Some metals can be polished to a high lustre ,Properties of non-metalsNon-metals are far more diverse in their appearance.Non-metals share some common properties.• Non-metals are often soft and have low melting pointsand boiling points. A number of non-metals are gases atroom temperature• All non-metals are poor conductors of heat and, withthe exception of a form of carbon called graphite, theyare poor conductors of electricity.Activity 3.3.1FG 332 MetalsExamining metals and non-metalsHere is what you needSamples or pictures of some different elementsHere is what you should do1. Look at each element carefully.2. Make a list of their features and determine whetherthe element is a metal or a non-metal.FIG333 Non-metalsProperties of semi-metalsAt first glance you might think that sihicon is a metal but it isactually a semi-metal. It has a mixture of properties,Metallic properties• It is hard and shiny, and has a high melting point andboiling pointNon-metallic properties:• It is a poor conductor of heat and a much weakerFG334 Silicon Oasenmed​