WAEC (WASSCE) Physics · Atomic and nuclear physics
Structure of the nucleus: WAEC Physics Past Questions and Answers
What the WAEC syllabus covers in Structure of the nucleus
Our summary: What the nucleus is made of, radioactive decay and half-life, and fission and fusion.
- Composition of the nucleus (Protons and neutrons. Nucleon number ($A$), proton number ($Z$), neutron number ($N$) and the equation $A = Z + N$ to be treated. Nuclides and their notation. Isotopes.)
- Radioactivity - natural and artificial (Radioactive elements, radioactive emissions ($\alpha$, $\beta$, $\gamma$) and their properties and uses. Detection of radiations by G-M counter, photographic plates, etc. should be mentioned. Radioactive decay, half-life and decay constant. Transformation of elements. Applications of radioactivity in agriculture, medicine, industry, archaeology, etc.)
- Nuclear reactions - fusion and fission (Distinction between fusion and fission. Binding energy, mass defect and energy equation: $E = \Delta m c^2$. Nuclear reactors. Atomic bomb. Radiation hazards and safety precautions. Peaceful uses of nuclear reactions.)
Syllabus content © The West African Examinations Council (WASSCE (harmonised West African syllabus)).
WAEC (WASSCE) Physics questions on Structure of the nucleus
- WAEC 2024The correct sequence of ionization power of alpha particle, gamma ray, and beta particle respectively is
- WAEC 2023In a controlled thermal fission reactor, the use of control rods will not affect the
- WAEC 2023What is the name given to the force of attraction between the nucleons in the nucleus of an atom?
- WAEC 2022Gamma rays are produced when?
- WAEC 2022The speed of fast-moving neutrons in a nuclear reactor can be reduced by using?
- WAEC 2022Arrange the following radiations in order of increasing ionization of air. I. Alpha Il. Gamma IIl. Beta
- WAEC 2022The half-life of a radioactive substance is 15 hours. If at some instance, the sample has a mass of 512 g, calculate the time it will take 7/8 of the sample to…
- WAEC 2020A beam consisting of -particles. -particles and -rays pass through a magnetic field at right angles to the direction of the field. Which of the following…
- WAEC 2020The material used to slow down the neutrons in a nuclear reactor is
- WAEC 2019The nucleon and proton numbers of a neutral atom of an element are 238 and 92 respectively. Determine the number of neutrons in the atom.
- WAEC 2018In which of the following fields is radioisotopes not used?
- WAEC 2018Which of the following is emitted in a process of natural radioactivity?
- WAEC 2017The nucleon number of an atom is the total number of
- WAEC 2016How many beta particle(s) are emitted in the radioactive decay of ^ 198 79 Au ^ 198 80 Hg ?
- WAEC 2016The phenomenon by which two light atomic nuclear combine to form a heavy nuclide with the release of energy is known as
- WAEC 2015in a nuclear fission process, the mass defect was 1.2 x 10-5kg. Calculate the energy released. [speed of the light in vacuum = c = 3.0 x 108 ms^ -1 ]
- WAEC 2015^ 226 88 Ra emits two alpha particles to produce polonium(po) nuclide. The correct formula for the nuclide?
- WAEC 2014The energy required to separate the nucleus in an atom completely is known as
- WAEC 2014An aluminum foil is placed across a beam of radiation from a radioactive source. Which of the following types of radiation will be stopped by it?
- WAEC 2014An element of nucleon number P and atomic number Q emits an alpha particle from its nucleus. The resultant numbers of the new element formed are respectively
- WAEC 2014Which of the following statements is the major advantage of nuclear fusion over nuclear fission?
- WAEC 2013Which of the following statements about the use of radioisotopes is not correct? They are used to
- WAEC 2013Which of the following particles are termed nucleons in a neutral atom?
- WAEC 2012Which of the following radiations emitted in radioactive decay has momentum, a fairly high penetrating power and is deflected by a magnet?
- WAEC 2012Which of the following arrangements of radiations is in the order of decreasing penetrating power?
- WAEC 2011Uranium-234 disintegrated to form Thorium-230 by emitting
- WAEC 2011Nuclear fusion is not used as a source of enegy because
- WAEC 2010A nuclide represented as ^ 70 32 X has a neutron-proton ratio of
- WAEC 2010Neutrons are used to induce artificial radioactivity because they
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