Properties of non-metals
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Give the points for non-metals being poor conductors of electricity
• Most non-metals are insulators, meaning charges can’t flow through them • If charges can’t move then no electric current flows. This is very useful because non-metals can be used to make things like plugs or electric cable covering
Give the points for non-metals being poor conductors of energy by heating
• Non-metals are really good insulators because they don’t transfer energy from a hot place to a cooler one quickly , Hot particles don’t pass vibrations very well
Give the points for non-metals not being strong and hard-wearing
• forces between most non-metals are weak - means they break easily • It’s easy to scrub atoms or molecules - means they wear away easily
Give the points for non-metals being dull
• They don’t reflect light very well and so they don’t have very smooth surfaces compared to metals • It makes them look dull
Give the points for non-metals being brittle
• Non-metals are held together by weak forces • They can shatter easily
Give the points for non-metals having low melting points and boiling points
• Forces that hold the particles together are very weak. This means they boil very easily • At room temperature, most non-metals are gases or solids. Only one is liquid
Give points for non-metals have low densities
• Some of these gases float in air • Even liquid and solid non-metals have low densities
Give the point for Non-metals being not magnetic
• Only a few metals iron, nickel and cobalt are magnetic • All non-metals are not magnetic