Unit 4 Periodic Table and Electrons

1234567891011121314151617181920
Across
  1. 3. A substance that cannot be broken down into simpler substances by chemical means
  2. 5. The principle stating that a maximum of two electrons may occupy a single atomic orbital, but only if the electrons have opposite spin
  3. 6. The smallest constituent unit of ordinary matter
  4. 8. A chart of the chemical elements arranged by atomic number
  5. 9. Negatively charged subatomic particle
  6. 12. Region surrounding the nucleus where electrons are likely to be found
  7. 16. Shorthand way of writing an elements electron configuration using the previous noble gas
  8. 18. Electrons are added one at a time to the lowest energy orbitals available until all the electrons of the atom have been accounted for
  9. 19. The central part of an atom, containing protons and neutrons
Down
  1. 1. The arrangement of electrons in the different energy levels in an atom
  2. 2. The number of protons in the nucleus of an atom
  3. 4. Taking in energy from light
  4. 7. Particles in the nucleus with no charge
  5. 10. Release of energy as light
  6. 11. The outermost electrons of an atom
  7. 13. Elements having similar chemical properties
  8. 14. Rows in the periodic table
  9. 15. A positively charged subatomic particle
  10. 17. Vertical columns in the periodic table
  11. 20. The arrangement of electrons in the orbitals of an atom