Across
- 3. most reactive element
- 6. the biggest number on an element
- 7. 1st element on the periodic table
- 8. negative charge
- 10. number of groups on the periodic table
- 11. name of the scientist that created the first periodic table
- 12. name of the last group in the periodic table
Down
- 1. name of the atom diagram
- 2. where the most metals in the periodic table are found
- 4. positive charge
- 5. has neutral charge
- 8. something made of one type of atom
- 9. oxide result of the reaction between iron and oxygen