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