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प्रश्न
The ions of normal elements are ______ whereas the ions of transitional elements are ______. (coloured/colourless)
रिक्त स्थान भरें
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उत्तर
The ions of normal elements are colourless whereas the ions of transitional elements are coloured.
Explanation:
Normal (representative) elements possess fully completed or completely empty valence shells, meaning they lack the electron configurations required to absorb visible light. Transition elements have partially filled d-orbitals, allowing valence electrons to absorb specific wavelengths of light and jump between energy levels (d-d transitions). This selective absorption causes transition metal ions to exhibit vibrant, characteristic colours.
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