Final Exam Vocabulary

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Across
  1. 2. process where some substances spontaneously emit radiation
  2. 5. high energy radiation that has no charge and no mass
  3. 8. ability of an atom to attract electrons when the atom is in a compound
  4. 10. the center-most part of an atom where the protons and neutrons are contained
  5. 11. the weighted average mass of an elements isotopes
  6. 12. energy required to remove an electron from an atom
  7. 13. device in which electrons travel as rays from negative to positive pole
  8. 14. atoms with the same number of protons but different numbers of neutrons
Down
  1. 1. one-half the distance between the nuclei of two atoms when the atoms are joined
  2. 3. radiation deflected toward the negatively charged plate
  3. 4. arrangement of electrons around atomic nucleus
  4. 6. equal to 1/12 the mass of a carbon-12 atom
  5. 7. The mass of this particle is 1/1840 of a hydrogen atom
  6. 9. the smallest particle of an element that retains the properties of that element