Across
- 6. this element is what we need to breathe in
- 7. this organisation is responsible for naming elements
- 8. these gases are in Group 8 and include Xenon and Argon
- 9. is a stinky element
- 10. this is the number of periods on the periodic table
Down
- 1. these metals sit in the middle of the periodic table
- 2. this alkali metal has the symbol 'K'
- 3. this element is number one
- 4. the rows in the periodic table are called this
- 5. this element was named after the village Ytterby in Sweden