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Seventh Grade (Grade 7) Bonds and Mixing Questions

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Grade 7 Bonds and Mixing
Ionic bonding occurs between
  1. a metal and a nonmetal
  2. two metals
  3. two nonmetals
  4. None of the above
Grade 7 Bonds and Mixing
Grade 7 Bonds and Mixing
A mixture in which the substances are not mixed evenly is called
  1. heterogeneous
  2. a solution
  3. precipitated
  4. homogeneous
Grade 7 Bonds and Mixing
In a mixture, substances
  1. keep their own properties.
  2. have a definite chemical composition.
  3. lose their original properties.
  4. combine chemically.
Grade 7 Bonds and Mixing
Which of the following is a solution?
  1. salt water
  2. chlorine
  3. milk
  4. muddy water
Grade 7 Bonds and Mixing
Grade 7 Bonds and Mixing
Carbon atoms can join other atoms in a
  1. double bond.
  2. triple bond.
  3. single bond.
  4. single, double, or triple bond.
Grade 7 Bonds and Mixing
The solubility of most solids in water can be increased by
  1. increasing the solvent
  2. increasing temperature
  3. stirring slowly
  4. increasing the solute
Grade 7 Bonds and Mixing
Which types of atoms usually become negative ions?
  1. metals
  2. nonmetals
  3. noble gases
  4. all of the above
Grade 7 Bonds and Mixing
Between which of the following atoms is a covalent bond most likely to occur?
  1. calcium and lithium
  2. sodium and fluorine
  3. nitrogen and oxygen
  4. helium and argon
Grade 7 Bonds and Mixing
A mixture in which the parts appear to be the same throughout.
  1. mixture
  2. homogeneous mixture
  3. pure substance
  4. computer
Grade 7 Bonds and Mixing
Jonny is mixing a solution in science class. He is told to mix sugar and oil. What will Jonny most likely conclude about his solution?
  1. Sugar is soluble in oil
  2. Sugar is insoluble in oil
  3. Oil is insoluble in sugar
  4. Oil is soluble in sugar
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