Hardness of transition metals is due to _?
Correct answer: D. Higher binding energies
- A. More melting point
- B. More electrons
- C. Variable oxidation state
- D. Higher binding energies
Explanation
Correct option is D. The d-orbital of transition elements which contain the unpaired electrons may overlap and form covalent bonds. Higher the number of unpaired electrons present in the transition metals, more is the number of covalent bonds formed by them and higher is the binding energies. This will further increase the hardness of the metal and its strength.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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