Unit 1 Vocabulary

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Across
  1. 3. notation of one or two letters representing one or two elements.
  2. 5. natural materials that do not produce heat or electricity
  3. 8. natural materials that have high electrical conductivity.
  4. 10. neutral charged subatomic particle.
  5. 11. emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
  6. 14. positively charged subatomic particle.
  7. 15. horizontal rows of the periodic table.
Down
  1. 1. describes the number of protons in the nucleus of an atom.
  2. 2. negatively charged subatomic particles.
  3. 4. electrons found in the outermost shell.
  4. 6. central and most important part of an object.
  5. 7. relative capacity of an atom, molecule, or radical that undergoes a chemical reaction with another atom
  6. 9. basic unit of a chemical element.
  7. 12. two or more types of atoms that have the same number of protons but different numbers of neutrons
  8. 13. a column in the periodic table of the chemical elements.