Worksheetsradioactivity
Total questions: 25
Worksheet time: 24mins
A certain radioactive sample has a half life of 2 years. After 6 years, how much of the sample is left?
1/2
1/3
1/16
1/8
What particle is released when an unstable isotope undergoes alpha radiation?
a helium nucleus
an electron
a photon of light
a neutron
An alpha particle is made up of
2 protons and 4 neutrons
1 proton and 1 neutron
2 protons and 2 neutrons
4 protons and 2 neutrons
When a substance undergoes beta decay
The atomic number increases by 1
The atomic number decreases by 2
The atomic number does not change
Which type of nuclear decay did Radon-198 go through?
alpha decay
beta decay
gamma decay
What will the values of x and y be?
x=194, y =83
x=194, y =84
x=194, y =85
I don't know. I should probably study this stuff more before the test.
A sample of Radium-228 decays from 100g to 12.5g. How many half lives did it experience?
1
2
3
4
How much of a 250g sample would be left after 5 half lives?
125g
62.5g
31.25g
7.81g
If the half life of Uranium-240 was 10 years, how long would it take for it to decay from 310g to 80g?
10 years
240 years
20 years
30 years
Who discovered X-ray accidentally while taking an x-ray photograph
Who discovered alpha ray that is emitted from the nucleus of uranium-238
Who discovered gamma ray that is emitted from the nuclei of radium and polonium?
SI unit for radioactivity
Aq
Bq
Ci
Fahrenheit
