6. Who made the law of octaves?
- Dmitri Mendeleev
- John Newlands
- John Dalton
7. What did Dmitri Mendeleev do in 1869
- Nothing
- Arranged the 50 known elements in order of atomic weights
- Ridicule John Newlands' law
8. Who was John Dalton?
- Arranged elements in order of their masses
- Law of octaves
- Made modern periodic table
9. Up to what element did the law of octaves work?
- Argon
- Calcium
- Helium
