Across
- 2. hold two or more atoms together to form a chemical bond
- 6. the row in periodic table
- 7. when compound is heated and breaks down into smaller products
- 10. non-reactive
- 12. have no charge
- 14. reactants transform into products
- 15. made of two or more that are chemically bonded together
- 17. arrangement of element in increasing atomic number
- 18. burning of substance in the presence of oxygen
- 19. final substance produced after a reaction occured
- 20. when a substance reacts with oxygen/oxidising substance
Down
- 1. both metal and non metal
- 3. fizzing/bubbling/ gas released
- 4. substance that can't be broken down into another substance
- 5. when the mass stays the same in a chemical reaction
- 8. always have a complete outshell
- 9. unreactive and in period 1 in periodic table
- 11. have the same number of protons but different numbers of neutrons
- 13. non-medal but conducts electricity
- 16. temperature where substances melt