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A metal M forms as oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal. |
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Answer» Period no. = no. of shells, so n = 3 From the formula M2O3 its valency is 3. Since it is a metal, its valence shell has 3 electrons. So its electronic configuration is 2, 8, 3 Atomic number =13 Hence the metal is Aluminum with valency 3. |
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