Across
- 2. this is the most reactive element in the periodic table
- 3. this group of elements is known as rare earth metals
- 6. this is the most unreactive group in the periodic table
- 8. this group of elements can't be found free in nature
Down
- 1. this i the largest group in the periodic table
- 4. this group of elements are very radioactive
- 5. this group has very toxic gases and the most reactive element
- 7. this is most reactive group in the periodic table