CHEMISTRY CROSSWORD

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Across
  1. 3. A particle with a charge of 1- and almost no mass, in an atom
  2. 5. A regular arrangement of particles
  3. 10. A metal oxide or hydroxide; a base will neutralize an acid to form a salt and water
  4. 11. Has a pH less than 7; an acidic solution contains H+ ions
  5. 14. Indicator paper that changes color to show if a solution is acidic or alkalin
  6. 16. Electron configuration: How electrons in an atom are arranged in electron shells; it is shown for example as 2,8,3
  7. 17. The physical change in which a gas turns into a liquid on cooling
  8. 19. The liquid in which a solute is dissolved, to make a solution
  9. 20. Elements are made up of atoms, which contain protons, neutrons, and electrons
  10. 22. The amount of solute that will dissolve in 100 grams of solvent, at a given temperature
  11. 24. destroy the structure of an enzyme by heat, or change in p
  12. 26. Takes in energy from the surroundings
  13. 27. A particle with a charge of 1+ and a mass of 1 unit, found in the nucleus of an atom
  14. 28. A byproduct of anaerobic respiration in muscles
  15. 29. The process in which crystals form, as a saturated solution cools
Down
  1. 1. Shows the elements in order of increasing proton number; similar elements are in columns called groups
  2. 2. A strong acid, meaning it completely dissociates in water
  3. 3. : A particle with no charge and a mass of 1 unit, found in the nucleus of an atom
  4. 4. Gives out energy
  5. 6. A soluble base; for example sodium hydroxide
  6. 7. The temperature at which a substance boil
  7. 8. The temperature at which a solid substance melt
  8. 9. Test to identify metal cation from the colours shown when their compounds are heated in a Bunsen flame
  9. 12. A unit of two or more atoms held together by covalent bonds
  10. 13. A chemical that shows by its colour whether a substance is acidic or alkaline
  11. 15. A mixture obtained when a solute is dissolved in a solvent
  12. 18. The bond formed between ions of opposite charge
  13. 21. Contains two or more substances that are not chemically combined
  14. 23. A compound made of atoms joined by covalent bonds
  15. 25. A weak organic acid, naturally found in citrus fruits