Across
- 4. Found properties repeat on the 8th element when arranged by atomic weight
- 6. Discovered noble gases
- 8. Created the element symbol system; determined the weight of 43 elements when bonded to oxygen
- 9. created a periodic table but didn't receive credit
Down
- 1. Discovered triads
- 2. Created the first periodic table & left gaps for undiscovered elements
- 3. Determined more accurate atomic weights
- 5. Added the Actinide Series to the Periodic Table
- 7. Arranged the elements by atomic numbers