Across
- 3. the same element but in a different form
- 5. have a neutral charge and are found in the nucleus
- 6. the element name of H
- 10. the periodic table of ________
Down
- 1. democritus coined the term ____
- 2. metals are good __________ of heat and electricity
- 4. have a positive charge and are found in the nucleus
- 7. _______ theory states that all substances are made up of atoms
- 8. found in the electron cloud and has a negative charge
- 9. take up most of the periodic table