Notes, Exercises, Videos, Tests and Things to Remember on Iron
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Atomic number: 26
Atomic weight: 55.84(56)
Valency: 2 and 3
Electronic configuration:1s2,2s2, 2p6,3s2, 3p6,4s2, 3d6
Iron is a transitional element and known as "d" block element. It belongs to Group VIII of the periodic table. It is the first transition series in the fourth period. On the left side of it, manganese is located whereas on the right-hand side, cobalt is found.
The names of two minerals (ores) of iron are haematite and magnetite. Iron is called metal because it is malleable and ductile and has high density and hard.
Rusting occurs when iron is exposed to moist air. The following chemical reaction takes place to rust on iron. 4Fe + 3O2 + X.H2O → 2Fe2O3.XH2O
When iron is dipped in copper sulphate solution, it displaces copper from its salt.
Fe + CuSO4 → FeSO4 + Cu
Iron metal can be extracted from the ore of haematite and aluminum metal can be extracted from bauxite ore.
The balanced chemical equation for the reaction between iron and dilute sulphuric acid is: Fe + H2SO4 (dil.) → FeSO4 + H2
Iron is not found in pure form in nature because iron is very reactive metal which can react with the different substance found in nature to form compounds.
The properties of iron are:
An iron displaces the less active metal from its salt solution; the iron gets coated with copper.
When iron reacts with dilute sulphuric acid Fe + dil. H2SO4 → FeSO4 + H2 ↑
When iron reacts with hot/conc. Sulphuric acid
Fe + dil. H2SO4 → Fe (SO4)3 + 3SO4 ↑ + 6H2O
When iron reacts with dil. /conc. Hydrochloric acid
Fe + 2HCl → FeCl2 + H2 ↑
When iron reacts with dilute and conc. Nitric acid.
4Fe + 10HNO3 → 4Fe (NO3)2 + NH4NO3 + 3H2O
Fe + 6HNO3 → Fe (NO3)3 + 3NO2 + 3H2O
Naturally occurring substances or minerals from which metals can be conveniently and economically extracted is ______.
The molecular formula of iron is ______.
The valencies of iron are ______.
1 and 2
2 and 3
3 and 4
These are the ores of iron ______.
All the answers are correct
The atomic number of iron is ______.
The atomic weight of iron is ______.
Iron is known as ______.
p block element
s block element
none of above
d block element