Across
- 3. ability to burn or ignite
- 6. neutral charge
- 8. smallest part of a element
- 9. substance composed of two or more elements
- 10. positive charge
Down
- 1. substance that consists of atoms
- 2. ability to reflect light
- 4. cloud outer layers of atom made up of energy levels
- 5. negative charge
- 7. center of the atom