Across
- 2. Same composition throuhout
- 3. When an atom gains electrons, it forms a negative ion
- 6. Electrical energy expression
- 7. the potential of a chemical substance to undergo a chemical reaction to transform into other substances
- 9. When an atom loses electrons, it forms a positive ion
- 10. A group of scientific laws that explain the nature of the process
Down
- 1. Change in appearance but not the composition
- 4. A tentative explanation
- 5. Atoms bonded together
- 8. Anything that occupies space and has mass