Scandium, Sc, is the first of the 3d blocks of elements in the Periodic table.Which properties of Sc approve the above fact?
Correct answer: D. Sc has ionic chloride and Sc readily forms oxidation state of +3
- A. Sc has ionic chloride.
- B. Sc readily forms oxidation state of +3.
- C. Compounds containing the Sc3+ ion are always colored.
- D. Sc has ionic chloride and Sc readily forms oxidation state of +3
Explanation
Scandium is the first element of the 3d block of transition metals, which means it has a partially filled d orbital. Some properties of Sc that support this include its ability to form stable compounds in the +3 oxidation state and its ionic chloride, which is formed due to the transfer of an electron from Sc to Cl.
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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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