Across
- 4. part of a atom with a neutral charge.
- 6. part of a atom with negative charge.
- 7. the center of a atom.
- 10. two or more substances that chemically combine .
Down
- 1. anything that has mass and takes up space.
- 2. one example ice It can change many states.
- 3. part of a atom with positive charge.
- 5. the Weight of something
- 8. two solids that you can sort apart .
- 9. the building blocks of the universe.