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Vanadium pentoxide is coloured. Why?...

Vanadium pentoxide is coloured. Why? 

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**Step-by-Step Solution:** 1. **Identify the Compound**: The compound in question is Vanadium pentoxide, which has the chemical formula \( V_2O_5 \). 2. **Determine the Oxidation State**: In Vanadium pentoxide, Vanadium (V) is in the +5 oxidation state. This can be determined from the formula, as the overall charge of the compound must be neutral. 3. **Understand the Electron Configuration**: Vanadium in the +5 oxidation state has a \( d^0 \) electron configuration. This means that there are no d-electrons present in the valence shell of Vanadium in this oxidation state. ...
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