A sample of carbon containing 1g of isotope, Half life of C-14 would be

2600

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3600

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4600

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5600

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Solution

The correct option is D 5600
The stability of a radioactive isotope can measured by its half life which is the time taken for an initial quantity of radioactive material to decay to one half amount which varies from 1 minute to years, e.g., $K^{12} =$ 124 hrs. ; $N a^{24} =$ 15 hrs. ; $P^{32} =$ 143 days ; $S^{35} =$ 87.1 day ; $C^{14} =$ 5600-5700 years ; $H^{3} =$ 12.5 years. Thus the sample of carbon-14 would contain $0.5 g$ after $5600 y e a r s$ .

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