Transition elements
A collection of metals with the following properties:
-hard, tough and strong
-high melting points (except mercury)
-malleable (can be hammered into different shapes) and ductile (can be drawn out into wires)
-good conductors of heat and electricity (silver is the best)
-high density (greater than water’s density)
-Much less reactive than group one metals, except for iron which rusts easily
-Have no trend in reactivity
-can be used as catalysts
-Mostly form coloured compounds
-can form complex ions
-Can form several differently charged ions: have variable valency, therefore…..
-they can form more than one compound with another element: FeO, Fe2O3