Across
- 3. atomic number 79
- 4. A substance that has a unique atomic number on the periodic table.
- 5. atomic number 13
- 8. atomic number 4
- 10. negatively charged atom
Down
- 1. found in group 1 of the periodic table
- 2. number of protons in the nucleus
- 6. A fundamental substance that has a unique atomic number on the periodic table.
- 7. A molecule containing two or more different atoms bound together
- 9. positively charged ion