Across
- 2. Dmitri ______ (last name) proposed the periodic table in 1869
- 3. It is the first element of the periodic table
- 6. Number of total periods
- 7. It is the second element of the periodic table
- 9. Elements are listed in the table by the structure of their
- 10. Each element has its own name and _____
- 11. The creator of the Periodic table was ______ (nationality)
Down
- 1. It is the same number of protons in each atom
- 4. The Periodic Table is a way of listing the
- 5. It is called "periodic" because elements are lined up in _____
- 8. There are 18 columns or ____