PRINCIPLES OF CHEMISTRY I: ACS
FINAL REVIEW EXAM
The number of neutrons in the 37/17 Cl- ion is:
A. 17
B. 20
C. 21
D. 37 - Correct Answers -B. 20
An Argon atom is isoelectronic with
A. Cl
B. Ca
C. Ti4+
D. N3- - Correct Answers -C. Ti4+
Which pair of particles has the same number of electrons?
A. F-, Mg2+
B. Ne, Ar
C. Br-, Se
D. Al3+, P3- - Correct Answers -A. F-, Mg2+
Which ion has twenty-six electrons?
A. Cr2+
B. Fe2+
C. Ni2+
D. Cu2+ - Correct Answers -C. Ni2+
Which statement is true?
A. The nucleus of an atoms contains neutrons and electrons.
B. The atomic number of an element is the number of protons in one atom.
C. The mass number of an atom is the number of protons in the nucleus plus the
number of electrons outside.
D. The number if electrons outside the nucleus is the same as the number of neutrons
in the nucleus. - Correct Answers -B. The atomic number of an element is the number of
protons in one atom.
In what respect does an atom of magnesium, Mg, differ from a magnesium ion, Mg2+?
A. The ion has an inert gas electron configuration; the atom does not.
B. The positive charge on the nucleus of the ion is two units greater than the nuclear
charge on the atom.
C. The ion has two more protons than the atom.
,D. The ion has two more planetary electrons than the atom. - Correct Answers -A. The
ion has an inert gas electron configuration; the atom does not.
A sodium ion differs from a sodium atom in that the sodium ion:
A. has fever electrons.
B. is an isotope of sodium.
C. exists only in solution.
D. has a negative charge on its nucleus. - Correct Answers -A. has fever electrons.
Which term best characterizes the relation of hydrogen to deuterium?
A. allotropes
B. isomers
C. isotopes
D. polymers - Correct Answers -C. isotopes
The element X occurs naturally to the extent 20.0% 12X and 80% 13X. The atomic
mass of X is nearest:
A. 12.2
B. 12.5
C. 12.8
D. 13.0 - Correct Answers -C. 12.8
In which pair are the two species both isoelectronic and isotopic?
A. 40/20 Ca2+ & 40/18 Ar
B. 39/19 K+ & 40/19 K+
C. 24/12 Mg2+ & 25/12 Mg
D. 56/26 Fe2+ & 57/26 Fe 3+ - Correct Answers -B. 39/19 K+ & 40/19 K+
An atom of the element number 84 and mass number 199 emits an alpha particle. The
residual atom after this change has an atomic number of _____ and a mass number of
_____.
A. 82, 195
B. 84, 203
C. 85, 195
D. 86, 199 - Correct Answers -A. 82, 195
In effective nuclear changes by bombarding target nuclei with positively charges alpha
particles, it is necessary to accelerate these particles to high speeds because it is
necessary to:
A. drive the positive particles through the electron cloud.
B. overcome the force of repulsion of the nucleus.
C. focus the bombarding particle more accurately.
D. strip electrons from the atom. - Correct Answers -B. overcome the force of repulsion
of the nucleus.
, What significant information about atomic structure came from the Millikan experiment
using charged oil drops?
A. Millikan showed the cathode rays were identical to a stream of electrons coming from
an atom.
B. Millikan confirmed that the neutron and proton were of about the same mass.
C. Millikan determined the magnitude of the charge on an electron.
D. Millikan proved that the mass of an atom was concentrated in the nucleus. - Correct
Answers -C. Millikan determined the magnitude of the charge on an electron.
What is the valence electron configuration for the element in Period 5, Group 3A?
A. 5s2 5p1
B. 3s2 3p5
C. 3s2 3p3
D. 5s2 5p3 - Correct Answers -A. 5s2 5p1
Which electron configuration is impossible?
A. 1s2 2s2 2p6 3s2
B. 1s2 2s2 2p6 3s2 3p6
C. 1s2 2s2 2p6 2d2
D. 1s2 2s2 2p5 3s1 - Correct Answers -C. 1s2 2s2 2p6 2d2
The ground-state electronic configuration of the manganese atom, Mn, is:
A. 1s2 2s2 2p6 3s2 3p6 4d5
B. 1s2 2s2 2p6 3s2 3p6 3d7
C. 1s2 2s2 2p6 3s2 3p6 4s2 4p5
D. 1s2 2s2 2p6 3s2 3p6 3d5 4s2 - Correct Answers -D. 1s2 2s2 2p6 3s2 3p6 3d5 4s2
Which species has this ground-state electron arrangement?
1s2 2s2 2p6 3s2 3p6 3d10?
A. Ni
B. Ni2+
C. Zn
D. Zn2+ - Correct Answers -D. Zn 2+
The maximum number of electrons that can occupy an orbital labeled dxy is:
A. 1
B. 2
C. 3
D. 4 - Correct Answers -B. 2
An atom of Fe has two 4s electrons and six 3d electrons. How many unpaired electrons
would there be in the Fe2+ ion?
A. one
B. two
C. three
D. four - Correct Answers -D. four
FINAL REVIEW EXAM
The number of neutrons in the 37/17 Cl- ion is:
A. 17
B. 20
C. 21
D. 37 - Correct Answers -B. 20
An Argon atom is isoelectronic with
A. Cl
B. Ca
C. Ti4+
D. N3- - Correct Answers -C. Ti4+
Which pair of particles has the same number of electrons?
A. F-, Mg2+
B. Ne, Ar
C. Br-, Se
D. Al3+, P3- - Correct Answers -A. F-, Mg2+
Which ion has twenty-six electrons?
A. Cr2+
B. Fe2+
C. Ni2+
D. Cu2+ - Correct Answers -C. Ni2+
Which statement is true?
A. The nucleus of an atoms contains neutrons and electrons.
B. The atomic number of an element is the number of protons in one atom.
C. The mass number of an atom is the number of protons in the nucleus plus the
number of electrons outside.
D. The number if electrons outside the nucleus is the same as the number of neutrons
in the nucleus. - Correct Answers -B. The atomic number of an element is the number of
protons in one atom.
In what respect does an atom of magnesium, Mg, differ from a magnesium ion, Mg2+?
A. The ion has an inert gas electron configuration; the atom does not.
B. The positive charge on the nucleus of the ion is two units greater than the nuclear
charge on the atom.
C. The ion has two more protons than the atom.
,D. The ion has two more planetary electrons than the atom. - Correct Answers -A. The
ion has an inert gas electron configuration; the atom does not.
A sodium ion differs from a sodium atom in that the sodium ion:
A. has fever electrons.
B. is an isotope of sodium.
C. exists only in solution.
D. has a negative charge on its nucleus. - Correct Answers -A. has fever electrons.
Which term best characterizes the relation of hydrogen to deuterium?
A. allotropes
B. isomers
C. isotopes
D. polymers - Correct Answers -C. isotopes
The element X occurs naturally to the extent 20.0% 12X and 80% 13X. The atomic
mass of X is nearest:
A. 12.2
B. 12.5
C. 12.8
D. 13.0 - Correct Answers -C. 12.8
In which pair are the two species both isoelectronic and isotopic?
A. 40/20 Ca2+ & 40/18 Ar
B. 39/19 K+ & 40/19 K+
C. 24/12 Mg2+ & 25/12 Mg
D. 56/26 Fe2+ & 57/26 Fe 3+ - Correct Answers -B. 39/19 K+ & 40/19 K+
An atom of the element number 84 and mass number 199 emits an alpha particle. The
residual atom after this change has an atomic number of _____ and a mass number of
_____.
A. 82, 195
B. 84, 203
C. 85, 195
D. 86, 199 - Correct Answers -A. 82, 195
In effective nuclear changes by bombarding target nuclei with positively charges alpha
particles, it is necessary to accelerate these particles to high speeds because it is
necessary to:
A. drive the positive particles through the electron cloud.
B. overcome the force of repulsion of the nucleus.
C. focus the bombarding particle more accurately.
D. strip electrons from the atom. - Correct Answers -B. overcome the force of repulsion
of the nucleus.
, What significant information about atomic structure came from the Millikan experiment
using charged oil drops?
A. Millikan showed the cathode rays were identical to a stream of electrons coming from
an atom.
B. Millikan confirmed that the neutron and proton were of about the same mass.
C. Millikan determined the magnitude of the charge on an electron.
D. Millikan proved that the mass of an atom was concentrated in the nucleus. - Correct
Answers -C. Millikan determined the magnitude of the charge on an electron.
What is the valence electron configuration for the element in Period 5, Group 3A?
A. 5s2 5p1
B. 3s2 3p5
C. 3s2 3p3
D. 5s2 5p3 - Correct Answers -A. 5s2 5p1
Which electron configuration is impossible?
A. 1s2 2s2 2p6 3s2
B. 1s2 2s2 2p6 3s2 3p6
C. 1s2 2s2 2p6 2d2
D. 1s2 2s2 2p5 3s1 - Correct Answers -C. 1s2 2s2 2p6 2d2
The ground-state electronic configuration of the manganese atom, Mn, is:
A. 1s2 2s2 2p6 3s2 3p6 4d5
B. 1s2 2s2 2p6 3s2 3p6 3d7
C. 1s2 2s2 2p6 3s2 3p6 4s2 4p5
D. 1s2 2s2 2p6 3s2 3p6 3d5 4s2 - Correct Answers -D. 1s2 2s2 2p6 3s2 3p6 3d5 4s2
Which species has this ground-state electron arrangement?
1s2 2s2 2p6 3s2 3p6 3d10?
A. Ni
B. Ni2+
C. Zn
D. Zn2+ - Correct Answers -D. Zn 2+
The maximum number of electrons that can occupy an orbital labeled dxy is:
A. 1
B. 2
C. 3
D. 4 - Correct Answers -B. 2
An atom of Fe has two 4s electrons and six 3d electrons. How many unpaired electrons
would there be in the Fe2+ ion?
A. one
B. two
C. three
D. four - Correct Answers -D. four
