Chapter 3/4 Chem 105

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Across
  1. 2. a mixture that is visually indistinguishable in parts and does have a uniform composition.
  2. 5. _____number, Number of nucleons
  3. 6. ___number, The number of protons in the nucleus
  4. 11. ex: mixture of sand in water or oil in water
  5. 12. Has a negative charge
  6. 13. consists of only a single element or a single compoundee,
  7. 14. A type of model that replicates an object at a more convenient scale.
  8. 15. Center of an atom
  9. 16. poor conductors of electricity and heat, neither malleable nor ductile
  10. 19. a combination of two or more substances in which each substance retains its properties
  11. 22. ex: Air and salt water
  12. 24. a property that characterize the ability of a substance to react with other substances or to transform from one substance to another.
  13. 26. any material consisting of only one type of atom.
  14. 27. an instrument used to observe the color components of any light source.
Down
  1. 1. Has the same number of electron shells
  2. 3. Share both metal and nonmetal characteristics
  3. 4. ex: milk and blood
  4. 7. a change where the chemical bonds are changed in a reaction.
  5. 8. Has a similar electron configuration
  6. 9. characterized as being shiny, opaque, and good conductors of electricity and heat
  7. 10. Has a positive charge
  8. 17. ___waves that are vibrations of electric and magnetic fields.
  9. 18. a property that describes the look or feel of a substance.
  10. 19. Determined the charge of an electron with the oil-drop experiment.
  11. 20. distance between two crests of an electromagnetic wave
  12. 21. Developed the planetary model
  13. 23. A type of model that is a representation of a system that helps us predict how the system behaves
  14. 25. Has no electric charge