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प्रश्न
The formula of carbonate of a metal M is M2CO3.
What will be the formula of its nitride ?
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उत्तर
Let us first work out the valency of the metal M (we know that carbonate ion has a valency of −2):
Element/Ion M `"CO"_3^(2-)`
It is clear that M has a valency of 1.
Formula of nitride of M:
Element / Ion M N3-
Valency 1 -3
Crossing the valencies, formula of the nitride of M is M3N.
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