Across
- 3. electron the second row of the energy level
- 6. the smallest thing in the world
- 7. not the hard stuff found underground
- 8. easily breaks
- 10. the hard stuff found underground
Down
- 1. bigger than a atom
- 2. the big table of elements
- 4. the science that deals with the identification of matter
- 5. mass
- 9. shiny