The magnetic behaviour of many transition metal compounds is explained by the presence of
Correct answer: B. unpaired electrons in the d orbitals
- A. paired electrons only
- B. unpaired electrons in the d orbitals
- C. an even number of protons
- D. delocalised pi bonds
Explanation
Unpaired electrons give the ion a magnetic moment, so the substance is drawn into a magnetic field and is described as paramagnetic, and the more unpaired electrons the stronger the effect. Ions with all electrons paired, such as Zn2+, are diamagnetic and are weakly repelled instead. Measuring the magnetic moment is therefore a way of counting unpaired electrons and deducing the structure of a complex.
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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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