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Posted: **Wed May 18, 2022 6:24 am**

: Question 19 If You Start With A 1 63 Kg Sample Of Radium 223 Ra 219rn 86 The Half Life Of Radium 223 Is 16 Days If Th 1 (145.22 KiB) Viewed 40 times

QUESTION 19 If you start with a 1.63 kg sample of radium. 223 Ra 219Rn+ 86 The half-life of radium 223 is 16 days. If the original mass of radium-223 is 1.63 kg, in 80 days, what would be the amount of radium-223 left? O A. 0.051 kg OB. 0.815 kg OC 0.408 kg OD. 1204 kg