Question
Which radioactive element with atomic number 43 in the
modern periodic table is unstable, and the half-lives of all its isotopes are relatively short, from 4.2 million years to 5.0 s?Solution
The correct answer is D
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A and B started a retail store with initial investments in the ratio 5:6 and their annual profits were in the ratio 2:3. If A invested the money for 8 m...
X started a business with Rs.12000. After 6 months, Y joined with x% of X’s capital. At the end of the year, Y’s share in the Rs.36000 total profit ...
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