$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$

Amy Lefley 1J
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

How do we know that radioactive decay is a first order reaction?

josie 1C
Posts: 18
Joined: Fri Sep 28, 2018 12:19 am

because the rate of decay is directly proportional to the concentration of atoms

Ray Guo 4C
Posts: 90
Joined: Fri Sep 28, 2018 12:15 am

Because it has a constant half-life. All first-order reactions have constant half-lives.

Patrick Cai 1L
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Joined: Fri Sep 28, 2018 12:25 am