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