Across
- 4. The LAST name of the man to create the first version of the periodic table.
- 5. How many sublevels are there in the periodic table?
- 6. Part of Group 18 because its energy levels are completely filled, making it unreactive.
- 8. Unreactive, found towards the far right side of the periodic table
- 10. The 14 elements with atomic numbers from 90 to 103, belong in periods 6-7 and groups 3-4.
Down
- 1. The physical and chemical properties of the elements are periodic functions of their atomic numbers.
- 2. The 14 elements with atomic numbers from 58 to 71, elements are very similar in chemical and physical properties.
- 3. which country was the first continental congress of chemists held?
- 7. The horizontal rows of the periodic table going from 1 -7 with 2 extras.
- 9. How many elements were discovered by the mid-nineteenth century?