The highest oxidation state shown by manganese is
Correct answer: C. plus 7
- A. plus 2
- B. plus 4
- C. plus 7
- D. plus 6
Explanation
Manganese has five 3d and two 4s electrons, so all seven can be involved in bonding, giving the plus 7 state found in the permanganate ion. That maximum equals the group number, and because the metal is so far from its stable configuration permanganate is a powerful oxidising agent. Plus 4 occurs in manganese dioxide and plus 2 in manganese two salts, which are the most stable.
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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