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WorksheetsRadioactivity
Total questions: 21
Worksheet time: 32mins
The unstable things in radioactive substance that emit radioactive rays
nucleus
neutron
proton
electron
SI unit for radioactivity
Aq
Bq
Ci
Fahrenheit
Unit used in radioactivity
Aq
Bq
Ci
Fahrenheit
time taken for the number of undecayed nuclei to be reduced to half of its original value
this is also known as
(a)
Which of the following are radioactive radiation in the form of radioactive ray?
alpha, α
theta, θ
beta, β
gamma, γ
delta, δ
Which of the following are radioactive radiation in the form of particle?
alpha, α
theta, θ
beta, β
gamma, γ
delta, δ
Which of the following are radioactive radiation?
alpha, α
theta, θ
beta, β
gamma, γ
delta, δ
Who won Nobel Price because of discovery in radioactivity?
Cobalt-60 decays to form Nickel-60 with half-life of 5 years.
Calculate the mass of Cobalt-60 after 20 years given its original mass is 16g.
(a)
The radioactive substance of P has a half-life of 2 hours. If the initial activity of P is 2000 Ci, what is the activity of substance after 8 hours?
(a)
how long is the half-life of radioactive substance in the diagram?
(a)
What is a safe level of background radiation does?
less than 0.2 mSv/h
less than 0.2 mSv/s
less than 0.2 μSvh
less than 0.2 μSv/s
Natural source of ionising radiation
Nuclear test
cosmic radiation
background radiation
nuclear accident
Ionising radiation are
Alpha particle, α
Beta particle, β
Gamma ray, γ
X-ray
Which radioactive radiation has a high ionising power
(a)
What radioactive radiation has no deflection when passing through magnetic field?
(a)
Gamma ray has a high penetration power.
Which of the following can stop gamma ray.
a piece of paper
3 mm aluminium sheet
10 cm lead block
human body tissue
Diagram shows an apparatus to detect radioactive dose absorbed into the body.
Name that apparatus.
(a)
Which of the following changes an atom into an anion?
gains one or more electron
loses one or more electron
gains one or more proton
loses one or more proton
Which of the following is the safest way to store radioactive materials?
Store in a thick and strong fiber glass case
Store in a thick-walled container made of lead
Store in an iron box and buried in the ground
Store in a vacuum container made from copper
are you really understand radioactivity???
Yes
No
