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The transition elements (Similarities- (They are all metals (Hard, tough…
The transition elements
There are 30 transition elements
Six familiar transition elements
Chromium (Cr) - Metallic silver
Manganese (Mn) - Metallic silver
Iron (Fe) - Metallic Grey
Cobalt (Co) - Metallic grey
Nickel (Ni) - Metallic silver
Copper (Cu)- Metallic bronze
Similarities
-
They are all metals
Hard, tough and strong
High density
High melting points
Form colored compounds
Can form with ions with different charges (
variable valency)
Elements and compounds often act as
catalysts
for other reactions
Example : Iron
Iron
Strong enough to be used in building bridges
Nearly 8 times the density of water
Melts at 1535 degree celsius
Compounds of irons usually green or brown
Iron can form Fe2+ and Fe3+ ions
Iron is used as a catalyst in the manufacture of ammonia
