Properties of Diamond: Hard substance High MP / BP Cant conduct electricity Properties of Graphite: Soft and slippery Good Conductor Properties of Silica: High BP / Substance Properties Uses MP Hard Diamond -Hardest substance In tools for drilling and and does not conduct cutting -Sparkles when cut For jewellery Silica -Hard, can scratch things -In sandpaper -Hard, lets through -For making glass and lenses -High melting -In bricks for lining furnaces Graphite -Soft and slippery -As a lubricant for engines -Soft and dark in color -For pencil with ‘lead’ clay) -Conduct electricity -For electrodes, and connecting brushes in generators. Comparing Bonds Differences in STRUCTURE Covalent Ionic Molecular ionic Shares electrons Exchange electrons Simple molecules Giant lattices Non metal only Metals and non metals
Substance Properties Uses Diamond -Hardest substance and does not conduct -Sparkles when cut In tools for drilling and cutting For jewellery Silica -Hard, can scratch things -Hard, lets through -High melting -In sandpaper -For making glass and lenses -In bricks for lining furnaces Graphite -Soft and slippery -Soft and dark in color -Conduct electricity -As a lubricant for engines -For pencil ‘lead’ with clay) -For electrodes, and connecting brushes in generators. Properties of Diamond: Hard substance High MP / BP Cant conduct electricity Properties of Graphite: Soft and slippery Good Conductor Properties of Silica: High BP / MP Hard Comparing Bonds Differences in STRUCTURE Covalent Ionic Molecular ionic Shares electrons Exchange electrons Simple molecules Giant lattices Non metal only Metals and non metals