8th Grade Physical Science Vocabulary Review

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