Transition metals have higher melting points and densities than group I metals because
Correct answer: C. both the d and s electrons take part in metallic bonding, giving a stronger and more compact lattice
- A. their atoms are much larger
- B. they contain no free electrons
- C. both the d and s electrons take part in metallic bonding, giving a stronger and more compact lattice
- D. they are non metallic in character
Explanation
A larger number of delocalised electrons per atom means stronger attraction between the cations and the electron sea, so more energy is needed to melt the metal and the atoms pack more closely, raising density. Group I metals contribute only one electron each and are correspondingly soft and low melting. This is why tungsten is used for lamp filaments and sodium can be cut with a knife.
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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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531 free Transition Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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