Unit B definitions

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Across
  1. 2. metals and non-metals.
  2. 3. cobalt and nickel
  3. 4. or absorption of energy (heat)
  4. 7. -the new materials produced by the
  5. 8. -is a combination of two or more elements in
  6. 10. proportions
  7. 14. of the reaction are called
  8. 15. -(part pharmacist and part mystic) developed many useful procedures, including
  9. 17. Mixture -each substance in the mixture is visible
  10. 22. out
  11. 24. Metal -are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.
  12. 25. -are not consumed in the reaction. These can be found in living and non-living things.
  13. 26. is a cloudy mixture in which tiny particles are held
  14. 27. always equal to the total mass of the products.
  15. 30. -In-between elements were called having properties of
  16. 32. types of colloids in which liquids are dispersed in
  17. 33. of a solid (precipitate) in a liquid
  18. 35. are reactive nonmetallic elements that form strongly acidic compounds with hydrogen, from which simple salts can be made
  19. 36. charges, called ions.
  20. 40. -help in the reactions in the body, which
  21. 41. change-Change in color
  22. 43. later was a problem, when more elements were discovered, because they ran out of planets.
Down
  1. 1. in odour
  2. 4. are called
  3. 5. -is a slow chemical change that occurs when oxygen in the air reacts with a
  4. 6. change lead and copper into gold
  5. 9. Law of Conservation of Mass- In a chemical reaction, the total mass of the reactants,
  6. 11. and they described the properties of many different materials. They also thought they
  7. 12. Cl
  8. 13. compounds -When non-metals combine, they produce
  9. 16. down food. They also get rid of poison in the body.
  10. 18. pure substance called a
  11. 19. Charges -A superscript ( + ) or a ( – ) are used to indicate the charge. Na+
  12. 20. with another substance, and can be
  13. 21. -is also a cloudy mixture, but the particles are so
  14. 23. metals -the only elements in this group known to produce a magnetic field are
  15. 28. -the substances at the
  16. 29. substance dissolved in water is called an aqueous
  17. 31. each substance is not clearly visible
  18. 34. Name -The combination of elements to form compounds has a chemical formula and a
  19. 37. Symbols -Early chemists used symbols of the sun and the planets to identify the elements known to them.
  20. 38. that they cannot be filtered out easily (emulsions
  21. 39. compound.
  22. 42. compound -are pure substances formed as a result of