Across
- 4. the burning of a substance in oxygen is an example of?
- 9. negative charge
- 10. a pure substance that is made from a single type of atom
- 11. argon
- 13. aluminium
- 16. magnesium
- 17. a column
- 19. positive charge
- 21. short-hand abbreviation is element name
- 22. hydrogen and oxygen
- 23. neutral charge
- 24. neon
Down
- 1. when electrons flow from atom to atom
- 2. made from atoms
- 3. a bunch of atoms that are stuck (bonded) together
- 4. calcium
- 5. an example of oxidation
- 6. helium
- 7. molecule that contains two or more different types of atoms
- 8. when a single compound breaks down into two or more simpler products
- 12. two or more substances combine to produce a single new substance
- 14. a row
- 15. nitrogen and oxygen
- 18. contain three major particles
- 20. carbon and hydrogen