True/False
Indicate whether the sentence or statement is true
or false.
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1.
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In any
chemical change, the structure of the particle does not change.
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2.
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Bubbles forming during a change is always evidence of a chemical change.
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3.
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If a
lighted splint is placed in a sample of hydrogen, the splint will go out.
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4.
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If 15
g of vinegar were added to 10 g of baking soda, a gas would be released and the mass of the products
would be less than 25 g.
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5.
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The
formula H2O means that water has twice as many hydrogen atoms as oxygen
atoms.
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6.
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Density is a measure of the amount of mass contained in a certain volume of a
substance.
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7.
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Physical properties of a substance include aspects such as colour, density, and
boiling point.
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8.
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Flame
tests are used to identify non-metallic elements.
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9.
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A
compound containing the element copper will burn with a pale green flame.
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10.
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A
chemical formula uses letters and numbers to represent the composition of a pure
substance.
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11.
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The
elements in a horizontal row on the periodic table have similar properties.
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12.
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Most
elements have melting points greater than 20°C.
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13.
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The
inert gases (noble gases) are the most reactive group of elements.
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14.
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Rutherford suggested that the atom was mainly empty space.
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15.
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A
neutron is a subatomic particle having no charge and a mass about the same as the
electron.
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16.
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The
Bohr model says that there is a small nucleus containing the positive charge and electrons in shells
around the nucleus.
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17.
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An
atom of  C contains 6 electrons, 8 protons, and 6
neutrons.
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18.
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The
mass number of an element tells the number of protons and neutrons in the nucleus.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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19.
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During
a physical change … a. | new substances are
produced | c. | heat is always
released | b. | the particles are not
changed | d. | the products have different chemical
properties from the reactants. | | | | |
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20.
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A
block of an unknown metal has a mass of 37.3 g and a volume of 3.3 cm3. Sara was asked to
identify the metal using the chart below. Which metal is it? a. | lead (density = 11.3
g/cm3) | c. | iron (density = 7.9
g/cm3) | b. | nickel (density = 8.9
g/cm3) | d. | tin (density = 7.3
g/cm3) | | | | |
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21.
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A
block of wood 2 cm long, 3 cm wide, and 4 cm high has a mass of 25 g. What is the density of the
block? a. | 0.96
g/cm3 | c. | 4.5
g/cm3 | b. | 1.04 g/cm3 | d. | 600 g/cm3 | | | | |
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22.
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Which
of the following is not a physical property? a. | flammability | c. | density | b. | colour | d. | melting point | | | | |
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23.
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Which
of the following is not a chemical change? a. | rusting | c. | baking | b. | burning | d. | dissolving | | | | |
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24.
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A
solution may be classified as a … a. | homogeneous pure substance | c. | heterogeneous pure substance | b. | homogeneous mixture
| d. | none of the above | | | | |
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25.
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If you
were to do an experiment to verify the law of conservation of mass, which of the following would be
most important? a. | Accurately
determining the mass of the reactants and products. | c. | Choosing the amount of reactants to be used.
| b. | Selecting
reactants that were in the solid state. | d. | Selecting the length of time that you would allow the
reaction to occur. | | | | |
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26.
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Which
of the following is not part of Dalton's atomic theory? a. | All matter is made up of small particles
ca |
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