`""^(226)Ra` disintegrates at such a rate that after 3160 years, only one fourth of its original amount remains . The half life of `""^(226)Ra` will b

`""^(226)Ra` disintegrates at such a rate that after 3160 years, only one fourth of its original amount remains . The half life of `""^(226)Ra` will b
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`""^(226)Ra` disintegrates at such a rate that after 3160 years, only one fourth of its original amount ... B. 3160 years C. 1580 years D. 6230 years
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