Valency of manganese
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This means that manganese (Mn group-7) has the electron configuration [Ar]4s²3d⁵ and 7 valence electrons, this can hv valence from +1–7 ,but generally manganese in its compounds has valency of +2,+4,+7 due to corresponding stable electronic configuration.
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Explanation:
2,8,13,2 is The Electronic Configuration of Maganese
-7,-6 is velency of Maganese
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