Physical Science Review

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Across
  1. 6. Chemical energy is converted to electrical energy at a power plant. A light bulb converts that electrical energy to what two new forms?
  2. 9. the periodic table is organized based on this property
  3. 15. substances that are made up of entirely of one kind of atom
  4. 17. shiny, malleable, ductile, good conductors
  5. 18. energy is never created or destroyed
  6. 21. temperature is a measurement of this
  7. 25. to change from a liquid to a solid thermal energy must be _______________
  8. 26. mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction
  9. 27. The formula for a sulfuric acid molecule is H2SO4. How many atoms are in each molecule?
  10. 28. dissolving is an example of this
  11. 29. caused by an increase or decrease in thermal energy
  12. 31. In exothermic reactions potential energy ______________
  13. 33. in an endothermic reaction ___________ have more energy than reactants
  14. 35. composed of protons and neutrons
  15. 37. Reactant → Product + ___________________; true of an exothermic reaction
  16. 38. a huge molecule with hundreds and sometimes thousands of atoms per molecule
Down
  1. 1. original substances are rearranged into new substances with different properties from the original substances
  2. 2. in this type of reaction it takes more energy to break the bonds of the reactants than what is released to form the products
  3. 3. the atomic number of sodium
  4. 4. in an endothermic reaction the _____________gains energy
  5. 5. stored energy due to the position or shape of something
  6. 7. a row in the periodic table
  7. 8. found to the right of the metalloids
  8. 10. a type of potential energy, stored in food
  9. 11. the element found in period 3 and group 16
  10. 12. evidence that a chemical change has taken place
  11. 13. group that contains the most un-reactive elements, group 18
  12. 14. in an exothermic reaction the temperature of the surroundings __________________
  13. 16. an example of an endothermic reaction
  14. 19. an example of a synthetic polymer
  15. 20. elements that share similar characteristics are found here
  16. 22. type of energy stored in the bonds between atoms of molecules
  17. 23. those on the outermost shell; included with the Lewis dot diagram
  18. 24. In an endothermic reaction potential energy ______________
  19. 28. charge of the nucleus
  20. 30. most of the atom is _______________ ______________
  21. 31. describes the nucleus of the atom
  22. 32. to find the number of neutrons ___________ the atomic number from the atomic mass
  23. 34. an example of a natural polymer
  24. 36. subatomic particles that have about the same mass