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c4 (group 0, transition metals, their compounds are very colourful…
c4
group 0
noble gases
heluim,neon , radon
colourless gases at room temp
monoatomic- single atoms
dont react
boiling, melting and density all increase when you go down
elements in same group react in similar ways as it has the same no of electrons
transition metals
hard
strong
shiny
conduct heat / electricity
high melting points
everyday metals
their compounds are very colourful depending on what transition metal ion they contain
Fe 2+ - light green
Fe 3+ - orange/ brown
Cu 2+ - blue
iron is the catalyst used in the haber process - make ammonia
transition metals and their compounds make good catalysts
transition metals have more than one ion
much less reactive than group 1 and 2 metals
react with dilute acids to form metal salts these happen slowly