Transition elements have coloured compounds because:
Correct answer: C. Splitting of the five degenerate d-orbitals take place
- A. Their bond energy is low
- B. They easily absorb energy
- C. Splitting of the five degenerate d-orbitals take place
- D. The d-orbitals are very close to p-orbitals
- E. Degenerate p-orbitals are present
Explanation
The reason why transition metals, in particular, are colorful is that they have unfilled or half-filled d orbitals. The Crystal Field Theory explains the splitting of the d orbital, which splits the d orbital into a higher and lower orbital.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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