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The half-life of ""_(92)^(238)U undergoing a-decay is 4.5 xx 10^9 years. What is the activity of 1g sample of ""_(92)^(238)U? |
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Answer» Solution :(a) The activity of a sample of radioactive NUCLEUS equals to its DECAY rate (or number of nuclei decaying per unit time). It.s SI unit is disintegration/s or BECQUEREL (b) `R = lambda N` `= (log_(e) 2xx 25.3 10^(20) xx 10)/( 4.5 xx 10^(9) )` `= ( 0.6931 xx 25.3 xx 10^(21) )/( 4.5 xx 109 xx 365 xx 24 xx 60 xx 60)` `=1.24 xx 10^(5)` dps |
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