8th Grade Physical Science Vocabulary Review

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Across
  1. 4. form of charge, designated negative, positive, or neutral (without charge)
  2. 6. elements in Group 3 with atomic numbers 89 - 103
  3. 9. subatomic particle without charge; contributes to mass of an atom
  4. 10. substances that change into new identity; difficult to put back into original matter
  5. 11. substance that takes part in & undergoes change during a reaction
  6. 12. found in groups 3 - 12 periodic table
  7. 13. found in group 17 periodic table
  8. 14. atomic mass unit; indicates mass on an atomic/molecular scale
  9. 17. elements typically not shiny, usually a gas or brittle solid, not malleable, & a poor conductor of heat & electricity
  10. 18. found in Group 2 Periodic Table
  11. 21. formulas and symbols written to represent a reaction
  12. 26. columns on periodic table that arranges the elements by the number of electrons that are in outside shell
  13. 28. pure substance that cannot be separated into simpler substances by physical or chemical means
  14. 30. most elements, typically solid, shiny malleable, & a good conductor of heat & electricity
  15. 32. found in group 13periodic table
  16. 33. form as result of loss or gain of electrons; identified by overall net charge
  17. 35. tiny, very dense, positively charged region in center of an atom; made up of protons & neutron
  18. 36. negatively charged subatomic particle; involved in formation of chemical bonds
  19. 37. rows in periodic table that classifies elements by number of atomic shells
  20. 38. something that can produce heat, power life, move objects, or produce electricity
  21. 40. oil, coal, natural gas
  22. 43. elements that have properties of both metals & nonmetals
  23. 44. combination of 2 or more substances that are not chemically combined
  24. 45. specific area where electrons of same energy level are found
  25. 46. atoms of same element that have different numbers of neutrons
  26. 48. substances that we obtain from land, water, & air around us, either renewable or nonrenewable
  27. 49. group 14 periodic table
  28. 50. substance produced during a chemical reaction
  29. 51. - can be observed without changing identity
  30. 53. found in Group 1 Periodic Table
  31. 54. mass of all reactants must equal mass of all products, mass is neither created nor destroyed
  32. 55. process by which one or more substances change to produce one or more different substances
Down
  1. 1. number placed in front of a chemical symbol or formula during balancing of equation
  2. 2. one/two letter notation used to represent a particular element
  3. 3. table showing chemical elements arranged according to their atomic numbers
  4. 5. resources that can be replenished in a short amount of time
  5. 7. number written below & to right of a chemical symbol, shows the number of a specific type of atom present
  6. 8. positively charged subatomic particle; contributes to the mass of the atom
  7. 15. anything that has mass & takes up space
  8. 16. two elements react to form a compound
  9. 19. found in group 18periodic table
  10. 20. electrons in the outermost energy level of an atom that influence how element will react with other substances
  11. 22. number of protons in the nucleus of one atom
  12. 23. particles smaller than an atom
  13. 24. attempt to fill electron shells; ionic bonds, covalent bonds, metallic bonds
  14. 25. found in group 15 Periodic Table
  15. 27. elements/compounds that can only be separated/combined to make substances with new properties by means of chemical reaction
  16. 29. cannot be remade or re-grown at a scale comparable to its consumption
  17. 31. pure substance composed of two or elements chemically
  18. 34. found in group 16 periodic table
  19. 39. smallest unit that has all of the properties of that element containing a nucleus within an electron
  20. 41. all of the area inside an atom surrounding nucleus where electrons are found
  21. 42. elements in Group 3 with atomic numbers 57 - 71
  22. 47. average mass of protons & neutrons in an element
  23. 52. rate at which chemical substance tends to undergo chemical reaction & significantly influenced by valence electrons