Periodic Table of Elements Vocabulary

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Across
  1. 4. any substance that cannot be decomposed into simpler substances
  2. 7. a neutral subatomic particle in the nucelus of an atom
  3. 9. a colorless, odorless, highly flamible gas with the atomic number 1
  4. 10. abbreviations used in chemistry for chemical elements
  5. 11. sharing of an electron pair between two atoms
  6. 13. a positively charged subatomic particle in the nucelus of an atom
  7. 15. column in the periodic table of elements where atoms have identical valence electrons
  8. 16. the mass of an atom of a chemical element expressed in AMUs
  9. 18. nonmetal chemical element with an atomic number of 8
  10. 19. the chemical element of atomic number 6, a nonmetal which has two forms (diamond and graphite)
Down
  1. 1. table of chemical elements arranged by atomic number
  2. 2. the number of protons in the nucleus of an aom which determines the chemical properties
  3. 3. elements whose properties are intermediate between those of metals and nonmetals
  4. 5. a negatively charged subatomic particle found in the energy level of an atom
  5. 6. a bond between oppositely charged ions
  6. 8. elements or substances that are not metals
  7. 12. class of substances characterized by high electrical and thermal conductivity as well as malleability, utility, and high reflectivity
  8. 14. the smallest particle that has the properties of an element
  9. 17. any atoms having the same number of protons but a different number of neutrons