Across
- 2. colorless, odorless reactive gas
- 3. appears between bromine and fluorine in the periodic table
- 5. it forms about 78% of earths atmosphere
- 6. the most reactive out of all elements
- 7. change when objects or substances undergo a change
- 10. an element forming black crystals and violet vapor
Down
- 1. highly flammable gas
- 3. change a substance that combines with another to form a new substance
- 4. a nonmetallic solid
- 8. nonmetal that has two main forms(atomic number 6)
- 9. lightest member of the noble gas