Across
- 3. are the 14 elements with atomic numbers from 90 (thorium, Th) to 103 (lawrencium, Lr).
- 7. What group is Bromine in?
- 8. Is the arrangement of the elements with similar properties fall in the same column or group
- 9. who's work led to finding atomic mass on the periodic table?
- 10. what group is Alkaline-earth metals in
Down
- 1. how many metalloids are on the periodic table
- 2. Who dicoverd the perodic law
- 4. what does Cu stand for on the periodic table
- 5. The physical and chemical properties of the elements are periodic functions of their atomic number
- 6. what element has the atomic number of 109?