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WorksheetsNuclear Physics
Total questions: 19
Worksheet time: 15mins
___________ is a process where an unstable nucleus becomes a more stable nucleus by emitting radioactive radiation
radioactive decay
half-life
nuclear fission
nuclear fusion
Which of the following is NOT in type of radioactive radiation?
Alpha decay ( α -decay)
Beta decay ( β -decay)
Gamma ray ( γ -ray)
X-ray
Thorium-232 decays and emits gamma ray. which of the following is true about gamma ray?
I. Gamma ray is type of electromagnetic wave
II. Gamma ray is neutral
III. Gamma ray does not have energy
I. and II.
I. and III.
II. and III.
Radioactive material X has a half-life of 5 days. What is the number of days taken for the activity of X to reduce to 12.5% of its initial activity?
5 days
10 days
15 days
20 days
A sample of radioactive material has an initial activity of 240 s-1 . If its half-life is 30 minutes, how much is its activity after 2 hours?
15 s-1
30 s-1
60 s-1
120 s-1
Nuclear energy is energy released from a ______ during nuclear reactions
fast-moving proton
fast-moving neutron
fast-moving electron
nucleus
________ is a nuclear reaction in which a heavy nucleus is split into two or more smaller and lighter nuclei after being bombarded by fast-moving neutron.
Radiaactive decay
Nuclear fission
Nuclear fusion
half-life
What is a beta particle made of?
One proton
A helium particle
One electron
One proton and one neutron
Of the main types of radiation emitted from naturally radioactive isotopes, which is the hardest to block?
Alpha deca
Gamma Decay
Beta decay
They are all blocked using the same method
The atomic number of a given element is
equivalent to which of the following?
Proton number in the nucleus
Neutron number in the nucleus
Sum of the protons and neutrons in the
nucleus
Sum of the protons, neutrons and electrons
What is the number of neutrons in Cesium?
55 neutrons
76 neutrons
84 neutrons
106 neutrons
139 neutrons
