the valency of iron
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6
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Iron (Fe) has an atomic number of 26, i.e. has 26 electrons. The energy of 4s and 3d orbital is similar (4s has slightly higher energy). Now, iron exhibits 2 valence states of +2 and +3. When iron loses the 2 4s electrons, it attains a valency of +2.
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1
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atomic number of Iron is 26 .
so , k = 2
l = 8
m= 8
n = 8
here we can see that all orbits are complete but it can't be possible . because iron is metal ,so new electronic configuration of iron is :-
k = 2
l = 8
m = 14
n = 2
or
k = 2
l = 8
m = 13
n = 3
so iron can have two valency, either be 2 or 3 .
hope it helps you ✌️✌️
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