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5 Written questions

5 Matching questions

  1. gain
  2. Lanthanides
  3. neutralization
  4. plasma
  5. Democritus's Theory
  1. a All elements are composed of atoms, which cannot be created, destroyed, or divided.
  2. b a reaction in which an acid combines with a base to form salt and water
  3. c a mixture of positive ions and free electrons
  4. d the process of melting, evaporation and sublimation require that the particles _____ energy
  5. e the set of transition metals that are shiny and found in the first row of the periodic table

5 Multiple choice questions

  1. states that the total amount of energy in a system is constant
  2. a neutral group of atoms held together by covalent bonds
  3. the joining of atoms to form new substances
  4. a reaction in which energy is absorbed
  5. the subatomic particles involved in forming chemical bonds

5 True/False questions

  1. mixturethe substance being dissolved


  2. evaporationthe change of a substance from a liquid to a gas


  3. freezinga positively charged atom in the nucleus of an atom


  4. Dalton's TheoryAtoms of the same element are exactly alike, and atoms of different elements are different.


  5. B, Si, As, Te, Sb, Gethe chemical symbols of the 6 metalloids