Modified True/False
Indicate
whether the statement is true or false. If false, change the identified word or phrase to make the
statement true.
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1.
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A neutron is a positively charged
particle.____________________
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2.
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The number of neutrons in an atom of boron-11 is greater than the number
of neutrons in an atom of carbon-12. ____________________
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3.
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The innermost electron shell of an atom can hold a maximum of 8 electrons.
____________________
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4.
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The atom model shown below represents an element that is an alkali metal.
____________________ 
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5.
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An atom with an atomic number of nine, has nine electrons in its
outermost shell. ____________________
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6.
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The electron configuration shown below represents an atom of magnesium.
____________________
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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Use the following information to answer the next question.
| Atomic
Features of Elements |
Element |
Number of
Electrons |
Number of Protons |
Mass Number |
M |
20 |
20 |
40 |
N |
8 |
8 |
16 |
O |
11 |
11 |
23 |
P |
27 |
27 |
59 |
Q |
10 |
10 |
20 |
R |
33 |
33 |
75 |
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7.
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Which element has the greatest number of neutrons in its atom?
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8.
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What is the mass number of helium?
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9.
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Which of the following subatomic particles makes up most of the mass of an
atom?
a. | electrons | c. | neutrons | b. | protons | d. | protons and
neutrons |
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10.
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Which of the following describes an electron?
a. | uncharged particle | b. | located in the nucleus | c. | positively charged
particle | d. | negatively charged particle |
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11.
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Which formula is used to determine the mass number of an atom?
a. | protons + neutrons | b. | protons + electrons | c. | neutrons +
electrons | d. | electrons + atomic number |
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Completion
Complete each
statement.
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12.
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The atomic number of an element is determined by the number of
____________________ present in the nucleus.
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13.
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In a neutral atom, the number of protons is equal to the number of
____________________.
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