Properties metal and non metals
Metal and Non-Metals Notes Physical Properties Physical Properties of Metals ● Hard and have a high tensile strength ● Solid at room temperature ● Sonorous ● Good conductors of heat and electricity ● Malleable, i.e., can be beaten into thin sheets ● Ductile, i.e., can be drawn into thin wires ● High melting and boiling points (except Caesium (Cs) and Gallium (Ga)) ● Dense, (except alkali metals). Osmium – highest density and lithium – least density ● Lustrous ● Silver-grey in colour, (except gold and copper) Non-Metals Nonmetals are those elements which do not exhibit the properties of metals. Physical Properties of Non-metals • Occur as solids, liquids and gases at room temperature • Brittle • Non-malleable • Non-ductile • Non-sonorous • Bad conductors of heat and electricity Exceptions in Physical Properties • Alkali metals (Na, K, Li) can be cut using a knife. • Mercury is a liquid metal. • Lead and mercury are poor conductors of heat. • Mercury expands significantly for the sl...