Across
- 1. The element with 2 protons
- 4. Which period of the periodic table corresponds with Lithium (Li)
- 5. The elements that touch the zigzag line (staircase) of the periodic table
- 7. Group one
- 8. Elements to the right of the periodic table
- 10. Which group of the periodic table corresponds with Halogens
- 12. Atom with different number of electrons
Down
- 2. Atom with different number of Neutrons
- 3. K
- 6. Hg
- 9. Democriticus coined this word
- 11. Sn