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WorksheetsP6 Radioactivity
Total questions: 33
Worksheet time: 26mins
Name the nucleons found in the nucleus. Select all that are correct
Proton
Electron
Beta
Neutron
The charge of any nucleus is
(a)
Isotopes of an element have different numbers of
(a)
How many neutrons does plutonium have?
(a)
What can be emitted from an unstable nucleus? Select all that are correct
Alpha
Beta
Gamma
Neutrons
A beta particle is a fast moving
proton
neutron
electron
alpha
If Lawrencium decayed by giving out an alpha particle, what would be the atomic number of the daughter nucleus formed?
(a)
If Einsteinium underwent beta decay, what would be the atomic number of the resulting daughter nucleus?
(a)
If Beryllium underwent neutron emission, what would be the mass number of the resulting daughter nucleus?
(a)
An atom which loses an electron becomes charged and is now known as an
(a)
What type of spectrum is this?
Absorption Spectrum
Emission Spectrum
Continuous Spectrum
Rainbow spectrum
Which particles in an atom are falling (after being excited) and are therefore causing the emissions of electromagnetic waves?
(a)
Which electromagnetic wave can never be emitted by electrons moving shells?
(a)
What name is given to the radiation all around us?
(a)
Which of the following are sources of background radiation? Select all that are correct
Radon gas
Cosmic rays
Electricity
Food and drink
The time taken for half of the radioactive nuclei in a sample to decay and become stable is known as the
(a)
What is the half-life of this substance?
(a)
After 4 half-lives, what fraction of nuclei in a sample are still radioactive?
1/2
1/4
1/8
1/16
A radioactive substance decays until only 1/8th of the nuclei remain radioactive. This takes 9 days. what is the half-life of this substance?
9
3
27
1.125
A sample contains 1600 unstable nuclei with a half life of 10 min. How many remain radioactive after 1 hour?
(a)
Tomatoes can be exposed to gamma radiation to sterilise them. Does this make them radioactive?
Yes
A very small amount
No, not at all
For beta to be emitted from a nucleus, what must turn into what?
A proton turns into a neutron
A neutron turns into a proton
Proton turns into an electron
Neutron turns into an electron
What material typically absorbs beta particles?
Paper
Tin foil
Few mm of Aluminium
Lead
Which material is most effective at blocking gamma rays?
Paper
Aluminium
Lead
Plastic
Which of the following are possible? Select all that are correct.
You can be irradiated without being contaminated by a radioactive substance
You can be contaminated with a radioactive substance without being irradiated
You can be contaminated and irradiated by a radioactive substance
Two radioactive substances decay. Both samples contain the same number of unstable nuclei at the start. One has a very short half-life, one has a very long half life. Which will have the higher activity at the start and is therefore more hazardous (assuming they both emit the same type of radiation)?
The substance with a long half-life
The substance with a short half-life
Select which are uses of gamma radiation. Choose all that are correct.
Smoke detectors
Radiotherapy
Medical tracers
Thickness testing E.g. in a paper mill.
Splitting a large unstable nucleus in order to release the nuclear store of energy is known as nuclear...
Fission
Fusion
In order to start nuclear fission by splitting a uranium nucleus, it must absorb a slow moving...
(a)
When a uranium nucleus undergoes fission, it releases 3 more neutrons that could go on and cause more fissions, resulting in a reaction that grows and grows. This is known as a (a) reaction.
Select all that are correct about generating electricity from nuclear fission
No carbon dioxide is released
Nuclear waste must be stored safely for 1000's years
It is an expensive way to generate electricity
It is reliable (can produce electricity 24 hours a day)
Energy is released in the sun from hydrogen nuclei by the process of nuclear...
(a)
Einstein's equation tells us that in both fission and fusion, mass is converted directly into...
(a)
