Question

Radium has atomic weight 226 and a half-life of 1600 years. The number of disintegrations produced per second from 1g are
A. `4.8 xx 10^(10)`
B. `9.2 xx 10^(6)`
C. `3.7 xx 10^(10)`
D. Zero

Answer 1

Correct Answer - C
`r = (0.693)/(t_(1//2)) xx N_(0) = (0.693)/(1600 xx 365 xx 24 xx 60 xx60) xx(6.023 xx 10^(23))/(226)`
`= 3.7 xx 10^(10)`dps