Question

25. The table shows details of two samples of radioactive nuclides X and Y
nuclide
number of
radioactive atoms
at time = 0
half-life
16 000
1 day
Y
2000
2 days
After how many days will the number of atoms of nuclide X be equal to the number of atoms of nuclide Y?
A
2 days
B
4 days
C
6 days
D
8 days

Answer 1

Answer:

C

Explanation:

X : 16000 - 8000 - 4000 - 2000 - 1000 - 500 - 250

Y: 2000 - 1000 - 500 - 250

X = 6 half lives passed = 6 days

Y = 3 half lives passed = 6 days