Across
- 3. Energy required to start a reaction
- 5. process of forming crystals from a solution
- 9. Substance added to sool to replace essential elements that are lost when crops are harvested
- 10. Chemical reaction involving transfer of electrons
- 11. the term to describe the core of an atom
- 12. Series of elements arranged by increasing atomic number
- 15. Reaction that absorbs heat
- 17. Process of boiling a liquid and then condensing the vapour produced back into a liquid
- 18. Type of force between molecules
Down
- 1. state of matter has no fixed shape nor volume
- 2. Point where a substance changes from liquid to gad
- 4. Unreactive
- 6. Term used to describe a reaction that can be changed from product to reactant or reactant to product over and over
- 7. ordered array of points describing the arrangement of particles that form a crystal
- 8. State of matter with no fixed shape but a fixed volume
- 13. An atom eith the same number of protons but different neutrons
- 14. Method determining the purity of a substance
- 16. Liquid that dissolves a solute to form a solution