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WorksheetsIGCSE Physics - Radioactivity and particles
Total questions: 13
Worksheet time: 7mins
The unit of activity is...
Becquerel
Seconds
Metres
Sievert
The atomic number indicates how many...are found in the nucleus of an atom.
Neutrons
Protons
Electrons
Quarks
The most penetrating form of nuclear radiation is...
alpha
beta
gamma
heat
Which best describes the structure of a beta particle?
helium nucleus
slow moving proton
fast moving electron
high frequency light wave
What is the half-life of this radioactive substance?
5700 years
11400 years
17100 years
22800 years
The overall charge on an alpha particle is...
-1
0
+1
+2
The overall charge on a gamma ray is...
-1
0
+1
+2
A hydrogen atom has an atomic number of 1, mass number of 1. The first isotope of hydrogen has an atomic number of...
0
1
2
3
Atomic decay or the process of radioactivity is a random process.
True
False
The most ionising form of nuclear radiation is...
alpha
beta
gamma
infrared
Carbon-12 has an atomic number of 6 and a mass number of 12. How many electrons would be found in a neutral atom of carbon-12?
6
12
18
24
A radioactive source has an initial activity of 200kBq and a half-life of 15 days. How many days would it take for the activity to fall to 25kBq?
15
30
45
60
A source of background radiation is...
cosmic rays from the Sun
radon gas in the air
radioactive isotopes in food
radioactive minerals in the earth
