Across
- 2. compound or substance that has been prepared
- 4. a group of atoms bonded together
- 6. 2 or more separate elements
- 7. basic unit of life
- 9. chemical bonds formed by sharing electrons between atoms
- 10. Na on periodic table
Down
- 1. more than 100 substances that cannot be chemically interconverted
- 3. relating or resembling metals
- 5. Cl on the periodic table
- 8. using ions