Across
- 4. go into solution
- 8. is a substance containning only one atom
- 9. is a starting chemical reaction
- 14. contains two or more substances that arenot chemically combined
- 16. is the number of protons in the nucleus of an atom
- 17. is a chemical made in a chemical reactant
- 20. is something without colour
- 22. is a measure of the concentration of hydrogen or hydroxyl ions in a solution
- 23. is the psychical change in which a gas turns into a liquid in cooling
- 25. is a minute portion of matter
- 26. is a weak solution
- 27. is a substance in which two or more elements are chemically combined
- 29. is the bond formed between ions of opposite charge
- 30. is a temperature at which a liquid changes to gas
Down
- 1. the equipment used for a specific purpose, mainly experiments. ex. laboratory gown, test tube, beaker, etc.
- 2. is the idea that for particles to react, they must collide
- 3. is a group Vii
- 5. is how electrons in an atom are arranged in electron shells
- 6. is proteins made by living cells, that act as biological catalyst
- 7. is a chemical formula (H2O)
- 10. is a molecule contains two atoms joined by a covalent bond
- 11. is a charged atom or group of atoms formed by the gain or loss of one or more electrons
- 12. is a compound made up of ions, joined by ionic bonds
- 13. is tells you how much of one substance is dissolved in another
- 15. is where liquid turns into a gas at a temperature below its boiling point, taking place at the surface of the liquid
- 18. is how fast a reaction is
- 19. increase the rate of a reaction and is unchanged
- 21. is a cloudy mixture of two or more substances that settle on standing
- 24. elements are made up of atoms, which contain protons, neutrons, and electron
- 28. tells how light or heavy a substance is, using mass and volume