Reena

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Across
  1. 2. particle that moves with the speed of light
  2. 3. is considered a negative ion
  3. 7. made up of two neutrons and two protons
  4. 9. The shell that electrons can be found located
  5. 11. Can be considered a single packet of energy or even matter
  6. 17. Arrangement of electrons that are around an atomic nucleus
  7. 20. form of energy that is both electrical and magnetic waves
  8. 21. distance of any point
  9. 22. An atom located in an outermost shell
Down
  1. 1. Has a high-energy
  2. 4. Number of waves that can be passed in a given amount of time
  3. 5. physical and chemical properties of elements
  4. 6. consider an ion with a positive charge
  5. 8. Type of diagram that can represent the valence electrons
  6. 10. can be a range around an atom that is excited by radiation or heat
  7. 12. An energy that gives off energy by matter
  8. 13. are types of energy that are associated with electrons
  9. 14. Has the lowest energy of state
  10. 15. A release of energy that decays
  11. 16. Has the shortest wavelength but highest energy
  12. 18. atoms that have eight electrons in the shell
  13. 19. Group of atoms that is impossible to remove