Across
- 4. there are 18 of these in the periodic table
- 5. there are 7 of these in the periodic table
- 6. all atoms of one type
- 7. gas that makes "pop" sound when burned
- 10. air has 21% of this
- 12. you need to know sulfuric acid and ..... acid
- 15. smallest particle of matter
- 17. metals do not break if you bend them, this is called
- 20. in a lab you always wear lab coat, gloves and ...
- 25. air has 78% of this
- 26. state of matter where particles slide over each other
- 28. state of matter where particles do not move, only vibrate
- 29. indicator that turns pink in alkali
- 30. methyl orange is this colour in alkali
Down
- 1. colour of hydrogen
- 2. this metal when added to water catches fire
- 3. a substance that is made of two or more different elements
- 8. two or more atoms held together
- 9. element Ar is named
- 11. element that goes after hydrogen
- 13. metals are shiny non-metals are ...
- 14. potassium reacts with chlorine and forms potassium ...
- 16. sodium oxide is formed when sodium reacts with ...
- 18. compounds that make litmus turn red
- 19. group 1 metals are called ... metals
- 21. state of matter where particles are far apart
- 22. zinc reacts with sulfuric acid and forms zinc ..... + hydrogen
- 23. second most common element in the Earth's crust
- 24. this metal when added to water will turn/melt into a ball
- 27. burning ... is used to test hydrogen