Across
- 2. what matter is made up of
- 4. atom with a net electric charge
- 6. model the nucleus surrounded by orbiting electrons
- 7. protons and neutrons are in this part
- 8. two forms of the same element
- 10. table, a table of all the elements
- 13. group of atoms bonded together
- 14. a positive charge
Down
- 1. a chemical element with the symbol C
- 3. a chemical made up of chemical substances
- 5. A chemical substance
- 9. a neutral charge
- 11. a negative charge
- 12. in the periodic table