Question

4.
(d) B will decay at a faster rate than A.
A sample originally contained 1020 radioactive atoms, which
emit a-particles. The ratio of a particles emitted in the third
year to that emitted during the second year is 0.3. How
many a-particles were emitted in the first year?
(a) 3 x 1018
(b) 3 x 1019
(c) 5 x 1018
(d) 7× 1019
i with decay constant 1.5/s is being​

Answer 1

Explanation:

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