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5 Written questions

5 Matching questions

  1. mixture
  2. valence electrons
  3. covalent bond
  4. melting
  5. isotopes
  1. a the force of attraction between the nuclei of atoms and the electrons shared by the atoms
  2. b the change of a substance from a solid to a liquid
  3. c atoms that have the same number of protons but different numbers of neutrons
  4. d the subatomic particles involved in forming chemical bonds
  5. e a combination of two or more substances that are not chemically combined

5 Multiple choice questions

  1. what color would pH paper turn in water?
  2. a reaction in which an acid combines with a base to form salt and water
  3. matter that has only one kind of atom
  4. is milk of magnesia an acid or a base?
  5. in what period is Neptunium found?

5 True/False questions

  1. producta positively charged atom in the nucleus of an atom


  2. electromagnetic forceforce that holds the electrons in place around the nucleus


  3. elements and compoundsmatter that has only one kind of atom


  4. 1 amua substance that ionizes to produce (OH-) ions


  5. sublimationa mixture in which particles of a material are dispersed throughout a liquid or gas but are large enough that they settle out


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