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Bonds and Mixing Questions - All Grades

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Grade 11 Bonds and Mixing
In chemistry, we describe a mixture as
  1. a combination of pure substances formed through chemical bonding.
  2. any substance possessing a uniform composition throughout.
  3. a physical combination of two or more types of substances,with each maintaining its own characteristic properties.
  4. any collection of elements chemically bound to each other.
Grade 5 Bonds and Mixing
Sand                   in water.
  1. dissolves
  2. does not dissolve
  3. dries
Grade 8 Bonds and Mixing
Carbon is able to bond with atoms of other elements in many different ways because it has                       .
  1. six protons
  2. four electrons
  3. six valence electrons
  4. four valence electrons
Grade 5 Bonds and Mixing
Which of the following is a mixture?
  1. gold
  2. steel
  3. iron
  4. nickel
Grade 8 Bonds and Mixing
To separate a mixture of paper clips and sand, Joe should use                    .
  1. wind separation
  2. distillation
  3. magnetic separation
  4. decanting
Grade 5 Bonds and Mixing
Which of these is a physical combination of different substances?
  1. element
  2. compound
  3. mixture
Grade 11 Bonds and Mixing
To draw Lewis diagrams, you need to do draw                                          .
  1. The chemical symbol and core electrons
  2. The chemical symbol only
  3. The chemical symbol and valence electrons
  4. The chemical symbol and all electrons
Grade 11 Bonds and Mixing
Valence electrons are best described in chemistry as
  1. positive electrons in the atom.
  2. all of the electrons in the atom.
  3. the outer shell electrons in the atom.
  4. the number of electrons the atom needs to be stable.
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 5 Bonds and Mixing
Materials in mixtures
  1. cannot be separated.
  2. can be separated physically.
  3. can only be separated by using a filter.
  4. can only be separated by using heat.
Grade 10 Bonds and Mixing
A bond formed by the attraction between oppositely charged ions is called a(n)                       .
  1. polar covalent bond
  2. ionic bond
  3. metallic bond
  4. nonpolar covalent bond
Grade 9 Bonds and Mixing
A shared pair of electrons is called                .
  1. a covalent bond
  2. an ionic bond
  3. an energy level
  4. a compound
Grade 11 Bonds and Mixing
A covalent bond typically forms between what kind of elements?
  1. two metals
  2. two nonmetals
  3. a nonmetal and a metal
  4. a nonmetal and a metalloid
Grade 5 Bonds and Mixing
Mixtures can be separated easily.
  1. True
  2. False
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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