Magnesium has atomic number as 12. Find out its valiancy.
The valency of magnesium with atomic number 12 is 2. The electronic configuration of magnesium is 2, 8, 2. As the valance shell contains two electrons, its valency is 2.
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A and B started a business with investments in the ratio 3:5 respectively. Find the share of A, if they earned a profit of Rs. 2000.
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