Across
- 2. What kind of reactions release heat?
- 4. Most reactive non-metal.
- 6. The 4th noble gas.
- 8. A reaction in written form.
- 10. Another name for acetylene.
Down
- 1. The second element of the periodic table.
- 3. The most common element in the universe.
- 5. In what kind of state is H20 at room temperature?
- 7. Result of a reaction.
- 9. An element with a molecular mass of 16.