True/False
Indicate whether the sentence or statement is true
or false.
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1.
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Atoms of
different elements have different numbers of protons.
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2.
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In an atom,
an electron that is close to the nucleus is on the highest energy level.
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3.
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To become
more stable, an atom that has two electrons in its outer energy level will gain two
electrons.
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4.
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It is easier
to remove an electron from the outer energy level than from one closer to 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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5.
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Some
elements are unlikely to lose or gain electrons, but share electrons to form covalent bonds. Which of
the following elements is most likely to form covalent bonds? a. | silicon
(#14) | c. | chlorine
(#17) | b. | oxygen (#8) | d. | sulfur (#16) | | | | |
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6.
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Matter that has the same composition and properties throughout is called a(n)
____. a. | substance | c. | atom | b. | mixture | d. | isotope | | | | |
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7.
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When
two pure substances are combined so that each of the pure substances retains its own properties, the
result is a(n) ____. a. | compound | c. | element | b. | mixture | d. | isotope | | | | |
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8.
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In
general, nonmetals are ____. a. | good conductors of electricity | c. | good conductors of heat | b. | malleable and
ductile | d. | gases at room
temperature | | | | |
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9.
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In
general, metals are ____. a. | poor conductors of heat | c. | poor conductors of electricity | b. | brittle | d. | good conductors
of heat | | | | |
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10.
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Water
and hydrogen peroxide have different properties because ____. a. | they are made
from different elements | b. | one contains a greater percentage of oxygen than the
other | c. | one is a compound and one is a
mixture | d. | only water follows the law of definite
proportions | | |
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11.
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Which
of these statements about matter is NOT true? a. | During chemical changes, matter is
destroyed. | b. | Matter has mass and takes up space. | c. | Matter can be
divided into pure substances and mixtures. | d. | Matter is made up of atoms. | | |
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12.
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The
millions of compounds that exist are made from approximately ____ elements.
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13.
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Most
of the mass of an atom is found in its ____. a. | nucleus | c. | atomic number | b. | electron
cloud | d. | mass
number | | | | |
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14.
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A
certain atom has 26 protons, 26 electrons, and 30 neutrons. It atomic mass is
____.
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15.
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The
particles that make up an atom are ____. a. | electrons, protons, and nuclei | c. | protons, neutrons, and nuclei | b. | elements, protons, and
electrons | d. | protons, neutrons, and
electrons | | | | |
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16.
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In an atom,
electrons ____. a. | are located in the
nucleus | c. | travel outside the
nucleus | b. | are paired with neutrons | d. | are always in the same place in an atom | | | | |
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17.
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The energy
levels of an atom are occupied by ____. a. | electrons | c. | neutrons | b. | protons | d. | ions | | | | |
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18.
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The maximum
number of electrons in the second energy level of an atom is ____.
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19.
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Identifiy from the atomic structure image below what letter B is pointing
at.
a. | electron | c. | neutron | b. | proton | d. | nucleus | | | | |
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20.
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Referring to question 19 and the atomic structure image, what is letter C pointing
at? a. | electron | c. | neutron | b. | proton | d. | nucleus | | | | |
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21.
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Referring to question 19 and the atomic structure image, whai is the region
surrounding the nucleus of the atom, where electrons are most likely to be found. a. | neutron
cloud | c. | atomic
cloud | b. | energy cloud | d. | electron cloud | | | | |
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22.
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Looking at the element Lithium below, how many electrons does it
have?
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23.
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Referring to question 22 and the element Lithium, what is the letter B pointing
at? a. | atomic structure
of the atom | c. | # of
protons | b. | atomic mass (mass number) | d. | atomic number | | | | |
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24.
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Referring to question 22 and the Lithium image, how many neutrons does Lithium
have?
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25.
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What
family is represented in the highlighted color below?
a. | alkali metal
family | c. | halogens | b. | alkaline earth metal family | d. | noble gases | | | | |
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