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Are the oxidation state and covalency of...

Are the oxidation state and covalency of `Be` in `[Be(H_(2)O)_(3)(OH)]^(+)` same?

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The correct Answer is:
No, the oxidation state of `Be` is `+2 ( :' 1 xx x -: 3 xx 0 +1 xx (-1) = +1]` and the covalenc is `4` (since four bonds are formed by `Be)`.
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