WorksheetsRadioactivity
Total questions: 21
Worksheet time: 18mins
Which particle has a negative charge
Alpha
Electron
Proton
Neutron
What is an isotope
An atom with the same number of neutrons different number of protons
An atom that has lost or gained an electron
An atom with the same number of protons, different number of neutrons
An atom with the same number of electrons and different neutrons
A scientist counts radioactivity as 120 counts per minute. The background count is 10 counts per minute. Which value should be recorded
12 counts per minute
110 counts per minute
130 counts per minute
1200 counts per minute
What is half life
Time taken for a radioactive atom to decay be 1/4
Time taken for a radioactive atom to decay by 1/3
Time taken for a radioactive atom to decay by 1/2
Time taken for a radioactive atom to decay by 1/5
Which is an alpha particle
Fast moving electron
4 2 He nuclei
fast moving positron
EM wave
The centre of an atom is called
the electron
the proton
the nucleus
the neutron
What stops beta radiation
Paper
Air
Glass
Aluminium 3mm or thicker
What type of decay is shown here
23892U ---> 23490Th + 42He.
alpha
beta
gamma
After 4 half-lives, 1g of a sample of Krypton-85 is left. What was the original mass of the sample?
16g
32g
0.0625g
4g
Identify the type of nuclear decay shown here
21483Bi → 0-1e + 21484Po
alpha
beta
gamma
__________________ is the process in which two or more smaller nuclei combine to create a larger, more stable nuclei.
Nuclear Decay
Nuclear Fission
Nuclear Fusion
None of the above
What is the major drawback to fission power?
Radioactive Waste
CO2 Emissions
SO2 Emissions
All of the Above
___________ starts the fission of a uranium atom.
Energy
Protons
One Neutron
All of the above
What is the role of the control rods in a nuclear reactor?
Absorb Gamma Radiation
Release Alpha Particles
Fuse Unstable Nuclei
Absorb Neutrons
What is the role of the moderator in an nuclear reactor?
Increase kinetic energy of neutrons
Watch out for nasty nasty comments posted by the neutrons
Slow neutrons to thermal neutrons so they can be absorbed by uranium
absorb neutrons so they do not go to create a chain reaction
