Across
- 1. created the periodic table
- 6. a solid material that is typically hard
- 7. element or substance that is not a metal
- 10. a yellow precious metal
- 12. a subatomic particle found in the nucleus of every atom except that of simple hydrogen
- 14. mass the mass of an atom of a chemical element expressed in atomic mass units.
- 15. number the number of protons in the nucleus of an atom
Down
- 2. stable subatomic particle with a charge of negative electricity
- 3. the positively charged central core of an atom
- 4. table a table of the chemical elements
- 5. family on the periodic table including bromine
- 8. the life-supporting component of the air
- 9. a yellow combustible nonmetal
- 11. the basic unit of a chemical element
- 13. fundamental constituent of matter