In context with the transition elements, which of the following statements is incorrect?
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In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes.
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In the highest oxidation states, the transition metal shows basic character and form cationic complexes.
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In the highest oxidation states of the first five transition elements (Sc to Mn), all the 4s and 3d electrons are used for bonding.
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Once the 5 d configuration is exceeded, the tendency to involve all the 3d electrons in bonding decreases.