Across
- 4. electrons ionic bond
- 7. bonds links between atoms determining their identity
- 9. reaction when chemical bonds give off heat
- 10. negative charge
Down
- 1. bond two nonmetals
- 2. positive charge
- 3. group of atoms help together by chemical bonds
- 5. bond metal and nonmetal
- 6. neutral charge
- 8. electrons covalent bond