Multiple
Choice
Identify the letter
of the choice that best completes the statement or answers the question.
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1.
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The number of possible orbital
shapes for the third energy level is
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2.
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The law of conservation of mass
follows from the concept that
a. | atoms are
indivisible. | b. | atoms of different elements have different
properties. | c. | matter is composed of atoms. | d. | atoms can be destroyed in chemical
reactions. |
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3.
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The box for an element from the
periodic table is shown. Which is the atomic mass?
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4.
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Which scientist developed the
model of the atom shown?
a. | Chadwick | c. | Rutherford | b. | Thomson | d. | Bohr |
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5.
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In Rutherford's
experiments, very few positively charged particles
a. | were slightly deflected as they
passed through the metal. | b. | were greatly deflected back from the metal. | c. | passed straight through the
metal. | d. | combined with the metal. |
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6.
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Which one(s) have a mass of 1
amu?
a. | electron | c. | proton and neutron | b. | proton | d. | electron and proton |
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7.
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An atom has 23 protons and 29
neutrons. Which is the correct chemical symbol for this atom?
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Atoms | | Atom | Protons | Neutrons | Electrons | | 1 | 8 | 10 | 8 | | 2 | 10 | 9 | 10 | | 3 | 9 | 9 | 9 | | 4 | 8 | 11 | 8 | | | | |
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8.
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Which two have the same
mass?
a. | Atoms 1 &
2 | c. | Atoms 1 &
4 | b. | Atoms 2 &
4 | d. | Atoms 2 &
3 |
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9.
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Which two are isotopes of one
another?
a. | Atoms 1 &
2 | c. | Atoms 1 &
3 | b. | Atoms 2 &
3 | d. | Atoms 1 &
4 |
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Atoms | | Atom | Protons | Neutrons | Electrons | Mass
Number | | Sodium | | 12 | | 23 | | Chlorine | 17 | | 17 | 35 | | | | | |
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10.
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How many neutrons are in an
atom of chlorine?
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11.
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How many electrons are in an
neutral atom of sodium?
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12.
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Which is the number of protons
in  ?
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13.
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Which element has 14
protons?
a. | Nitrogen | c. | Aluminum | b. | Silicon | d. | Sulfur |
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14.
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In Rutherford's
experiments, most of the particles
a. | bounced
back. | c. | were absorbed by the
foil. | b. | passed through the foil. | d. | combined with the foil. |
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15.
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Because a few positively
charged particles bounced back from the foil, Rutherford concluded that such particles
were
a. | striking
electrons. | b. | indivisible. | c. | repelled by densely packed regions of positive
charge. | d. | magnetic. |
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16.
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Rutherford's experiments
led to the discovery of the
a. | electron. | c. | nucleus. | b. | cathode ray. | d. | neutron. |
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17.
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What did Rutherford conclude
about the structure of the atom?
a. | An atom is
indivisible. | b. | Electrons make up the center of an atom. | c. | An atom carries a positive
charge. | d. | An atom contains a small, dense, positively charged central
region. |
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18.
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Most of the volume of an atom
is occupied by the
a. | nucleus. | c. | electron cloud. | b. | nuclides. | d. | protons. |
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19.
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The radius of an atom extends
to the outer edge of the
a. | nucleus. | c. | region occupied by the neutrons. | b. | region occupied by the
electrons. | d. | positive
charges. |
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20.
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Atoms of the same element that
have different masses are called
a. | moles. | c. | nuclides. | b. | isotopes. | d. | neutrons. |
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21.
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Isotopes of an element contain
different numbers of
a. | electrons. | c. | neutrons. | b. | protons. | d. | nuclides. |
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22.
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The most common form of
hydrogen has
a. | no
neutrons. | c. | two
neutrons. | b. | one neutron. | d. | three neutrons. |
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23.
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Which has a charge of
+1?
a. | proton | c. | electron | b. | atom | d. | neutron |
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24.
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According to the modern concept
of the atom, which are located in the nucleus of an atom?
a. | electrons and
protons | c. | neutrons and
electrons | b. | protons only | d. | protons and neutrons |
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25.
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Which type of orbital is
shown?
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26.
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Which is the correct number of
valence electrons in the element Gallium (Ga)?
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27.
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Which is the correct number of
valence electrons in the element Sulfur (S)?
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28.
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Which element has the electron
configuration 1s22s22p63s23p64s23d4?
a. | Titanium
(Ti) | c. | Sulfur
(S) | b. | Chromium (Cr) | d. | Selenium (Se) |
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29.
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Which element has the electron
configuration 1s22s22p63s23p4?
a. | Titanium
(Ti) | c. | Sulfur
(S) | b. | Chromium (Cr) | d. | Selenium (Se) |
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30.
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Which is the correct electron
dot diagram for the element Silicon (Si)?
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