Across
- 4. What is the name of group 1?
- 7. Which element has an atomic number of 20?
- 8. Which element has an atomic mass of 4?
- 10. How many groups on the periodic table are there?
Down
- 1. Which group has a full valence shell?
- 2. What is the name of the large group of metals in the middle of the periodic table?
- 3. How many metalloids are there?
- 5. Which is the rarest element on Earth?
- 6. What does Ag stand for?
- 9. What is the name of the element named after the inventor of the modern periodic table?