Across
- 2. positive part of atom
- 4. groups of atoms held together by chemical bonds
- 6. negative part of atom
- 7. protons neutrons and electrons make
- 8. outer most shell of electrons
- 9. transferred electrons is a ____ bond
Down
- 1. shared electrons are a ____ bond
- 3. neutral part of atom
- 5. numbers and letters to make a
- 6. reaction that gives off heat