Explain scandiun shows only two oxidation state +2,+3
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Explanation:
The electronic configuration of Scandium (Sc) is
1s2 2s2 2p6 3s2 3p6 3d1 4s2
In the last shell of Scandium there are 3 electrons. So, it is easy to donate 3 electrons to be ionized. Thats why the oxidation state of Sc is +3.
Scandium also exists in +2 state but it is not stable.
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