WorksheetsStable and Unstable Nuclei
Total questions: 29
Worksheet time: 16mins
The graph of neutron number against proton number shows three nuclei P, Q and R.
Which of the following identifies an isotope of P and the nucleon number of this isotope of P?
Isotope of P: Q
Nucleon number of isotope of P: y + 1
Isotope of P: Q
Nucleon number of isotope of P: x + y + 1
Isotope of P: R
Nucleon number of isotope of P: x + y + 1
Isotope of P: R
Nucleon number of isotope of P: x + 1
23692U undergoes a series of decays to produce 20482Pb
How many alpha decays are involved in this decay series?
5
6
8
10
An iodine nucleus decays into a nucleus of Xe−131, a beta-minus particle and particle Y.
Which is a property of particle Y?
It has a lepton number of +1
It is an antiparticle
It is negatively charged
It experiences the strong interaction
When a nucleus of the radioactive isotope 6528Ni decays, a β– particle and an electron antineutrino are emitted.
How many protons and neutrons are there in the resulting daughter nucleus?
Number of protons: 28
Number of neutrons: 65
Number of protons: 29
Number of neutrons: 65
Number of protons: 29
Number of neutrons: 36
Number of protons: 30
Number of neutrons: 35
23290Th is an unstable nuclide in a radioactive decay series. It decays by emitting an α particle. The next two nuclides in the series emit β− particles.
What nuclide is formed after these three decays have taken place?
Which sequence of radioactive emissions results in the formation of an isotope of the original element?
one α particle and one β− particle
one α particle and two β− particles
two α particles and one β− particle
two α particles and two β− particles
A radioactive nucleus emits a β–. particle then an α particle and finally another β–. particle. The final nuclide is
an isotope of the original element
the same element with a different proton number
a new element of higher proton number
a new element of lower nucleon number
A nucleus of a particular element decays, emitting a series of α and β− particles.
Which of the following series of emissions would result in an isotope of the original element?
1 α and 1 β−
1 α and 2 β−
2 α and 1 β−
2 α and 2 β−
Why does alpha decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
Why does beta decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
Why does gamma decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
Fluoride ions are produced by the addition of a single electron to an atom of fluorine 199F
What is the magnitude of specific charge of the fluoride ion?
3.2 × 10–26 C kg–1
8.4 × 10–21 C kg–1
5.0 × 106 C kg–1
4.5 × 107 C kg–1
An atom of 167N gains 3 electrons.
What is the specific charge of the ion?
1.80 × 107 C kg–1
–1.80 × 107 C kg–1
4.19 × 107 C kg–1
–4.19 × 107 C kg–1
The composition of a carbon dioxide (CO2) molecule is one atom of 126C and two atoms of 168O.
What is the number of molecules of CO2 in 2.2 kg of the gas?
1.0 × 1022
3.0 × 1022
3.0 × 1025
4.7 × 1025
The radius of a nucleus of the iron nuclide 5627Fe is 4.35 × 10–15 m.
What is the radius of a nucleus of the uranium nuclide 23892U?
2.69 × 10–15 m
2.89 × 10–15 m
6.55 × 10–15 m
7.05 × 10–15 m
Which of the following nuclei has the smallest specific charge?
Which nucleus has a smaller value of specific charge than the nucleus 188O?
What is the best estimate for the order of magnitude for the diameter of an atom?
10−14 m
10−12 m
10−11 m
10−8 m
When bombarded with an α particle the nuclide 2512Mg changes into another nuclide with the emission of a neutron and γ radiation.
What are the correct values for the nucleon number and proton number of the nuclide which is formed?
Nucleon number: 29
Proton number: 14
Nucleon number: 29
Proton number: 12
Nucleon number: 28
Proton number: 14
Nucleon number: 27
Proton number: 12
A calcium ion is formed by removing two electrons from an atom of 4020Ca . What is the specific charge of the calcium ion?
3.2 × 10–19 C kg–1
2.9 × 10–18 C kg–1
4.8 × 106 C kg–1
4.8 × 107 C kg–1
In a nuclear reaction 147N is bombarded by neutrons. This results in the capture of one neutron and the emission of one proton by one nucleus of 147N. The resulting nucleus is
