Skip to content

Course home

5.2.4a Half-life

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

Question 63

A sample of a radioactive isotope has an initial rate of emission of 160 counts per minute and a half-life of 6 days. How long will it take for the rate of emission to fall to 20 counts per minute?

A

$6$ days

B

$12$ days

C

$18$ days

D

$24$ days

Markscheme

5.2.4a Half-life Questions

IGCSE
Physics
5.2.4a Half-life

144 exam-style questions on CIE IGCSE Physics 5.2.4a Half-life. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank