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Eighth Grade (Grade 8) Bonds and Mixing Questions

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Grade 8 Bonds and Mixing
Grade 8 Bonds and Mixing
Grade 8 Bonds and Mixing
Compare and contrast mixtures and compounds. Which statement is true about mixtures and compounds?
  1. Mixtures and compounds are the same throughout.
  2. Mixtures and compounds are made of two or more elements in a definite proportion.
  3. Mixtures must be separated by chemical methods and compounds by physical methods.
  4. Mixtures contain two or more elements physically combined and compounds contain two or more elements chemically combined.
Grade 8 Bonds and Mixing
[math]MgF_2[/math] is an example of a(n)
  1. Ionic bond
  2. Metallic bond
  3. Covalent bond
  4. Noble bond
Grade 8 Bonds and Mixing
Grade 8 Bonds and Mixing
Grade 8 Bonds and Mixing
Grade 8 Bonds and Mixing
A chemical bond is
  1. a group of atoms that are joined together
  2. the basic particle of matter
  3. the force that holds two atoms together
  4. a substance formed from the chemical combination of two or more atoms
Grade 8 Bonds and Mixing
A chemical bond is
  1. a group of atoms that are joined together
  2. the basic particle of matter
  3. the force that holds two atoms together
  4. a substance formed from the chemical combination of two or more atoms
Grade 8 Bonds and Mixing
Which of these is an immiscible substance?
  1. potassium carbonate
  2. sodium chloride
  3. oil
  4. (a) and (b)
Grade 8 Bonds and Mixing
What holds sodium chloride crystals together?
  1. covalent bonds
  2. ionic bonds
  3. a sea of electrons
  4. metallic bonds
Grade 8 Bonds and Mixing
The two major categories of matter are?
  1. Atoms and molecules
  2. Homogeneous and heterogeneous mixtures
  3. Mixtures and substances
  4. Elements and compounds
Grade 8 Bonds and Mixing
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