Skip to content

Course home

Sign up

5.2.4a Half-life

EasyMedium
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869
Question 62

A radioactive material has a half-life of 12 hours.

A sample of the material contains 3.2 × 1011 atoms.

How many atomic nuclei have decayed after 48 hours?

A

2.0×10102.0 \times 10^{10}2.0×1010

B

1.6×10111.6 \times 10^{11}1.6×1011

C

2.4×10112.4 \times 10^{11}2.4×1011

D

3.0×10113.0 \times 10^{11}3.0×1011

Markscheme

5.2.4a Half-life Questions

  1. IGCSE
  2. /Physics
  3. /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