Across
- 2. atoms held together by chemical bond
- 3. group of atoms bonded together
- 7. a prepared substance
- 9. anything that has mass
- 10. joined together
Down
- 1. math like relationship expressed with symbols
- 4. particle with charge of negative electricity
- 5. components are not chemically bonded
- 6. same type of atoms grouped together
- 8. known as the building blocks