Across
- 4. Halogens do not occur in the free state (True/False)
- 6. What is the atomicity of halogens
- 8. The atoms all have _______ valence electrons.
- 9. What is the most reactive element in group 17?
- 10. Chemical properties of group 17 involves the accepting 2 electrons to form negatively charged ion (True/False)
Down
- 1. The atomic size of group 17 elements _______ down the group.
- 2. Element X dissolve in water to produce a solution that turns the blue litmus paper red and then decolorized. What is element X?
- 3. Which halogen is radioactive
- 5. All elements in group 17 elements are
- 7. Group 17 of the periodic table is known by the name of