The nuclide notation for a generic element is given below:
Which of the following is the correct definition of each of the terms?
| X | A | Z |
A | symbol | nucleon number | proton number |
B | symbol | proton number | nucleon number |
C | symbol | neutron number | proton number |
D | nucleon number | proton number | neutron number |
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An atom consists of electrons orbiting a nucleus. The nucleus contains protons and neutrons.
For the atom to be neutral, which statement about the atom must be correct?
The number of electrons is equal to the number of protons.
The number of protons is equal to the number of neutrons.
The number of electrons, protons and neutrons are all different.
The number of electrons is equal to the number of neutrons.
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How many neutrons are in a nucleus of aluminium? The chemical symbol is given below:
13
27
14
40
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Which of the following statements would not be correct for the nucleus of any atom?
The nucleus contains protons and neutrons.
The nucleus has a total charge of zero.
The nucleus is very small compared to the size of the atom.
The atom contains the same number of protons and electrons.
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Extended tier only
Nuclear reactions can release huge amounts of energy.
Which nuclear reaction takes place in the Sun and which nuclear reaction takes place in a nuclear power station?
| The Sun | A nuclear power station |
A | fusion | fusion |
B | fusion | fission |
C | fission | fission |
D | fission | fusion |
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Extended tier only
Fusion is a type of nuclear reaction.
Which term below is a correct statement about nuclear fusion?
It occurs in nuclear power stations.
It involves a larger nucleus decaying into two (or more) smaller nuclides.
Uranium is a type of fuel for nuclear fusion.
Light nuclei (such as hydrogen and helium) fuse together, releasing energy in the process.
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A neutron and a proton are near to a positive nucleus.
If anything, what would happen to the proton and the neutron due to the charge on the nucleus?
The neutron is repelled; the proton is attracted.
The proton is not affected; the neutron is attracted.
The proton is repelled; the neutron is attracted.
The proton is repelled; the neutron is not affected.
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