Across
- 2. something that helps or goes though change
- 7. The same or alike
- 8. They make up matter
- 9. the out come of something
Down
- 1. the answer to a problem
- 3. Mendeleev made them into a table
- 4. The mass of the atom
- 5. The maker of the periodic table of elements
- 6. atoms bonded together