Nuclear fission is defined as:
In alpha decay, the nucleon number of the daughter nucleus compared to the parent nucleus:
The fuel used in a nuclear fission reactor is uranium. Which of the following is required for fission to proceed?
In a nuclear power station, which component slows down fast neutrons to thermal neutrons?
Gamma radiation is best described as:
In beta-minus decay, the proton number of the nucleus:
Which type of radiation has the greatest ionising power?
Which of the following best explains why nuclear fusion releases energy?
A nucleus of bohrium \(^{267}_{107}\text{Bh}\) decays to mendelevium \(^{255}_{101}\text{Md}\) by a sequence of three alpha-particle emissions. How many neutrons are there in a nucleus of Bh?
In the reaction \(^{18}_{8}\text{O} + ^{4}_{2}\text{He} \rightarrow ^{19}_{9}\text{F} + X\), what is particle X?
Which ionizing radiation produces the greatest number of ion pairs per mm in air?
In the reaction \(^{14}_{7}\text{N} + ^{4}_{2}\text{He} \rightarrow ^{17}_{8}\text{O} + X\), what is particle X?
Radioactive decay is said to be a spontaneous process. This means that:
In the reaction \(^{1}_{1}\text{p} + ^{2}_{1}\text{H} \rightarrow ^{3}_{2}\text{He} + Q\), using masses: proton = 1.00728 u, ²H = 2.01355 u, ³He = 3.01493 u. What is Q?
Carbon-14 has a half-life of 5730 years. A sample of ancient wood has an activity of 0.115 Bq. A living sample of the same mass has an activity of 0.25 Bq. The approximate age of the ancient wood is:
Radon-86Rn-222 decays by alpha- and beta-emission to bismuth 83Bi-214. How many alpha- and beta-particles are emitted?
For a nuclear reactor in which the fission rate is constant, which one of the following statements is correct?
In the reaction \(^{235}_{92}\text{U} + ^{1}_{0}\text{n} \rightarrow ^{140}_{54}\text{Xe} + ^{94}_{38}\text{Sr} + x^{1}_{0}\text{n}\), what is the value of x?
When an atom emits an alpha particle, the atomic number of the daughter nucleus:
What is not conserved in nuclear processes?
The table gives the range and number of ion pairs per centimetre produced by beta particles compared to alpha particles of the same energy. Which row is correct?
What is not conserved in nuclear processes?
Which of the following best describes the decay constant for a radioisotope?
In the nuclear reaction \(^{14}_{7}\text{N} + ^{4}_{2}\text{He} \rightarrow ^{17}_{8}\text{O} + X\), particle X is:
An unstable nucleus recoils as it emits an alpha particle. This is due to the conservation of: