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WorksheetsRadiation (2)
Total questions: 14
Worksheet time: 13mins
Beryllium-9 is a stable isotope of beryllium.
State the meaning of the term stable.
Has a long half-life
Undertakes radioative decay
Does not emit ionising radiation
Emits ionising radiation
Alpha, beta and gamma are types of ionising radiation.
Which of the following is NOT a description of how gamma radiation is different from alpha radiation.
Alpha is a helium nucleus
Alpha has a mass
Gamma penetrates further
Gamma travels slower
Ionising radiations are emitted by unstable nuclei.
Some unstable nuclei decay by emitting β− radiation.
Describe the process of B- emission
Iodine-131 is a radioactive isotope with a half-life of 8 days.
The activity of a sample of iodine-131 is 480 Bq.
Calculate the activity of the sample after 16 days.
80 Bq
120 Bq
240 Bq
480 Bq
Which of these describes half-life?
the time it takes for half of the undecayed nuclei to decay
the time it takes for all of the undecayed nuclei to decay
half the time it takes for all of the undecayed nuclei to decay
half the time it takes for half of the undecayed nuclei to decay
What type of radiation is used for sterilisation of medical equipment?
alpha
beta
gamma
Xray
What type of radiation is used in household fire (smoke) alarms?
Alpha
Beta
Gamma
Xray
What type of radiation is used in gauging thickness of cardboard?
Alpha
Beta
Gamma
Xray
What type of radiation is used in irradiating food?
Alpha
Beta
Gamma
Xray
Radioactivity is used in PET scanners in hospitals.
Describe one use of PET scanners in hospitals.
State a precaution that hospital staff should take when working with radioactivity.
(a)
Use one of the following words to complete the sentences about nuclear fission of uranium-235 (U-235)
A neutron hits a nucleus of U-235 and causes the nucleus to ____________
fuse
chain
split
chemical
Use one of the following words to complete the sentences about nuclear fission of uranium-235 (U-235)
Each fission releases energy, two daughter nuclei and some ___________
protons
electrons
neutrons
quarks
Use one of the following words to complete the sentences about nuclear fission of uranium-235 (U-235)
In a nuclear reactor, one fission can set off a controlled _________ reaction.
chain
chemical
nuclear
fuse
