Barium-131 is a radioactive isotope of the element barium used gastrointestinal tract scans in doctors offices. Barium-131 has a half-life of 10 days. lf a patient drinks 3.9 grams of barium-131 how much of the isotope will be left after 1 days?

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Answer 1 · 2016-11-29T03:45:46

#sf(3.6color(white)(x)g)#

#sf(N_t=N_0e^(-lambdat)#

#:.##sf(lnN_t=lnN_0-lambdat)#

#sf(lambda=0.693/t_(1/2)=0.693/10=0.0693color(white)(x)d^(-1))#

#:.##sf(lnN_t=ln(3.9)-0.0693xx1=1.361-0.0693=1.2916)#

#:.##sf(N_t=3.638color(white)(x)g)#