Across
- 2. The vertical columns in the periodic table are known as...
- 6. The change of state from a gas to a liquid
- 10. A solution with a pH value less than 7
- 12. The horizontal rows in the periodic table are known as...
- 13. Halogens tend to be very ...
- 15. An example of an exothermic reaction
- 17. The middle block of the periodic table is called the...
- 18. What substance do acids need to to give their typical acid reactions?
- 19. A reaction with oxygen to release energy
- 20. Fluorine gas is an example of a ...
Down
- 1. Alkalis contain... (ions)
- 3. The gain of oxygen
- 4. An acidity or alkalinity of a substance can be shown using an...
- 5. An example of an endothermic reaction
- 6. A gas that turns limewater cloudy
- 7. The change of state from solid to gas
- 8. The number of bonds that can form
- 9. Gives oxygen to another substance
- 11. Group 1 metals get ... reactive down the group
- 14. A substance that speeds up a reaction
- 16. Acids contain... (ions)