Chapter 4 Review Crossword Puzzle

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Across
  1. 2. / A distinct kind of atom or nucleus characterized by a specific number of protons and neutrons.
  2. 5. / The branch of science concerned with the investigation and measurement of spectra produced when matter interacts with or emits electromagnetic radiation.
  3. 6. / a stable subatomic particle occurring in all atomic nuclei, With a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
  4. 8. / A discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.
  5. 11. / Forming nouns denoting verbal action.
  6. 12. Cloud / It is used to describe where electrons are when they go around the nucleus of an atom.
  7. 13. / The SI unit of frequency, equal to one cycle per second.
  8. 14. / A particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.
Down
  1. 1. / The central and most important part of an object, movement, or group, forming the basis for its activity and growth.
  2. 3. / Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.
  3. 4. / The rate at which a vibration occurs that constitutes a wave, either in a material.
  4. 7. /
  5. 9. Particle / A helium nucleus emitted by some radioactive substances, originally regarded as a ray.
  6. 10. / The positively charged electrode by which the electrons leave a device.