1st May '26

P1.5 Keywords

P136
  1. Nuclear weapon (1) - P1:1
    • a bomb or missile that uses nuclear energy to cause an explosion.
  2. Hazard (1) - P1:1
    • a danger or risk.
  3. Beta (1) - P1:1
    • a fast-moving electron emitted by radioactive decay of substances.
  4. Alpha (1) - P1:1
    • a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
  5. Alpha particle (1) - P1:1
    • a helium nucleus emitted by some radioactive substances.
  6. Cosmic rays (1) - P1:1
    • a highly energetic atomic nucleus or other particle travelling through space at a speed approaching that of light.
  7. Precaution (1) - P1:1
    • a measure taken in advance to prevent something dangerous, unpleasant, or inconvenient from happening.
  8. Proton (1) - P1:1
    • a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.
  9. Electron (1) - P1:1
    • a stable subatomic particle with a charge of negative electricity.
  10. Neutron (1) - P1:1
    • a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
  11. Dose (1) - P1:1
    • an amount of ionizing radiation received or absorbed at one time or over a specified period.
  12. Fission (1) - P1:1
    • division or splitting into two or more parts.
  13. Element (1) - P1:1
    • each of more than one hundred substances that cannot be chemically broken down into simpler substances and are primary constituents of matter.
  14. Isotope (1) - P1:1
    • forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
  15. Random (1) - P1:1
    • happening without method or conscious decision.
  16. Gamma (1) - P1:1
    • penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei.
  17. Spontaneous (1) - P1:1
    • performed or occurring as a result of a sudden impulse or inclination and without premeditation or external stimulus.
  18. Nuclear fallout (1) - P1:1
    • radioactive particles that are carried into the atmosphere after a nuclear explosion and gradually fall back as dust or in precipitation.
  19. Sievert (1) - P1:1
    • the SI unit of dose equivalent (the biological effect of ionizing radiation), equal to an effective dose of a joule of energy per kilogram of recipient mass.
  20. Division (1) - P1:1
    • the action of separating something into parts or the process of being separated.
  21. Contamination (1) - P1:1
    • the action or state of making or being made impure by polluting or poisoning.
  22. Technology (1) - P1:1
    • the application of scientific knowledge for practical purposes, especially in industry.
  23. Penetration (1) - P1:1
    • the extend to which radioactive wave or particle can pass through an object.
  24. Orbit (1) - P1:1
    • the path of an electron round an atomic nucleus.
  25. Atomic nucleus (1) - P1:1
    • the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
  26. Nuclei (1) - P1:1
    • the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
  27. Irradiation (1) - P1:1
    • the process by which an object is exposed to radiation. The exposure can originate from various sources, including natural sources.
  28. Emission (1) - P1:1
    • the production and discharge of something, especially gas or radiation.
  29. Charge (1) - P1:1
    • the property of matter that is responsible for ellectricity existing in a positive or negative form.
  30. Ratio (1) - P1:1
    • the quantitative relation between two amounts showing the number of times one value contains or is contained within the other.
  31. Mass (1) - P1:1
    • the quantity of matter which a body contains.
  32. Chain reaction (1) - P1:1
    • the self-sustaining fission reaction spread by neutrons which occurs in nuclear reactors and bombs.
  33. Atom (1) - P1:1
    • the smallest particle of a chemical element that can exist.
  34. Radioactive decay (1) - P1:1
    • the splitting of unstable nuclei to emit radioactive waves.
  35. Half-life (1) - P1:1
    • the time taken for the radioactivity of a specified isotope to fall to half its original value.
  36. Unstable (1) - P1:1
    • volatile and likely to react.
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