79) A line spectrum is to an element as a(n) ________ is to a person.
A) brain
B) eye
C) fingerprint
D) ear
80) A line spectrum is NOT
A) continuous.
B) discrete.
C) unique.
D) an energy profile.
81) The line spectra of atoms provides experimental evidence for
A) the organization of particles in the nucleus of atoms.
B) the number of protons.
C) the arrangement of electrons.
D) all of the above
82) In attempting to explain the line spectrum of hydrogen, Bohr suggested that the energy of electrons in
atoms is
A) zero.
B) infinite.
C) continuous.
D) quantized.
83) The lines in an atomic line emission spectrum are due to
A) nuclear transitions in atoms.
B) movement of electrons from lower energy states to higher energy states in atoms.
C) movement of electrons from higher energy states to lower energy states in atoms.
D) the presence of isotopes.
84) As the energy level of an electron increases, the electron’s distance from the nucleus, on average,
A) increases.
B) decreases.
C) remains the same.
D) cannot be predicted.
85) The number of electrons in a neutral atom is equal to the
A) atomic mass.
B) atomic number.
C) atomic weight.
D) number of neutrons.
86) When an electron in an excited atom “falls down” to a lower energy level, the excited atom emits a
characteristic
A) electron.
B) neutron.
C) photon.
D) proton.
87) The maximum number of electrons that may reside in the n = 2 energy level is
A) 6.
B) 8.
C) 2.
D) 16.
88) Give the main shell configuration for chlorine.
A) 17
B) 18
C) 2, 8, 7
D) 35
89) How many electrons are there in a argon atom?
A) 36
B) 18
C) 40
D) 24
90) How many electrons are there in a Ca atom?
A) 20
B) 40
C) 21
D) 60
91) How many electrons are there in a Sb atom?
A) 51
B) 122
C) 71
D) 33
92) The model for the atom which has electrons in fixed orbits was developed by
A) Rutherford.
B) Schrödinger.
C) Bohr.
D) Einstein.
93) When an electron moves from the ground state to the excited state, it
A) absorbs energy and moves closer to the nucleus.
B) absorbs energy and moves farther from the nucleus.
C) emits energy and moves closer to the nucleus.
D) emits energy and moves farther from the nucleus.
94) In the quantum mechanical view of the atom, electrons are confined to charge clouds called
A) clouds.
B) orbitals.
C) energy levels.
D) ions.
95) Which is a result of the mathematically based quantum view of electrons in atoms?
A) The position of every electron in an atom is precisely known.
B) All electrons have the same position in atoms.
C) The most probable position of each electron can be predicted.
D) The position of electrons in atoms is not important.
96) The designations s, p, d, f designate
A) different electron energy levels.
B) different electron orbitals within an energy level.
C) different types of electrons.
D) valence electrons.
97) Which is an IMPOSSIBLE electron configuration?
A) 1s2 2s2
B) 1s2 2s2 2p4
C) 1s3 2s2 2p5
D) 1s2 2s2 2p6 3s2
98) The ground state electron configuration for sodium is
A) 1s2 2s2 2p6 3s2 3p4.
B) 1s2 2s2 2p6 3s1.
C) 1s2 2s2 2p6.
D) 1s2 2s2 2p6 3s2 3p6 4s1.
99) The element with the ground state electron configuration of 1s2 2s2 2p6 3s2 is
A) Mg.
B) Ca.
C) Mn.
D) Ne.
100) The element with the ground state electron configuration of 1s2 2s2 2p6 3s2 3p5 is
A) Ar.
B) Cl.
C) S.
D) Br.
101) What is the maximum number of electrons that can occupy a single orbital?
A) 1
B) 2
C) 8
D) 0
102) What is the maximum number of electrons that can occupy the 2s sublevel?
A) 3
B) 1
C) 4
D) 2
103) An s sublevel can hold a maximum of
A) 2 electrons.
B) 6 electrons.
C) 10 electrons.
D) 14 electrons.
104) An f sublevel can hold a maximum of
A) 2 electrons.
B) 6 electrons.
C) 10 electrons.
D) 14 electrons.
105) An element with electronic structure 1s2 2s2 2p4 is in which group of the periodic table?
A) II A
B) IV A
C) VI A
D) VIII A
106) A d sublevel can hold a maximum of
A) 2 electrons.
B) 6 electrons.
C) 10 electrons.
D) 14 electrons.
107) Which orbital will have the lowest energy?
A) 4d
B) 4f
C) 4p
D) 4s
108) Which orbital will have the highest energy?
A) 4d
B) 4f
C) 4p
D) 4s
109) Which orbital will have the lowest energy?
A) 3d
B) 3p
C) 4s
D) 2p
110) Which orbital will have the highest energy?
A) 3d
B) 3p
C) 4s
D) 2p
111) A vertical column in the modern periodic table is called a
A) period.
B) group.
C) branch.
D) valence.
112) A horizontal row in the modern periodic table is called a
A) period.
B) group.
C) branch.
D) valence.
113) Elements in the same group have
A) the same atomic number.
B) the same number of neutrons.
C) the same number of electrons.
D) the same number of valence electrons.
114) Elements in the same period have
A) the same atomic number.
B) the same number of neutrons.
C) the same number of valence electrons.
D) none of the above
115) Which element is a nonmetal?
A) calcium
B) magnesium
C) chlorine
D) chromium
116) Which element is a metal?
A) Mg
B) S
C) P
D) Br
117) Which element is in the same group as sodium?
A) Cl
B) K
C) Mg
D) Si
118) Which element is in the same period as neon?
A) F
B) Ar
C) Na
D) Br
119) Which element is a noble gas?
A) B
B) C
C) Xe
D) Na
120) Which element is an alkaline earth metal?
A) Ba
B) F
C) Rb
D) Ar
121) Which element is a halogen?
A) Ba
B) Li
C) Xe
D) F
122) Which element is a transition metal?
A) Mg
B) Cd
C) Ar
D) I
123) Which element is an inner transition metal?
A) Ba
B) K
C) La
D) Zr
124) In which group do all atoms have seven valence electrons in the ground state?
A) alkali metals
B) alkaline earth metals
C) halogens
D) noble gases
125) In which group do all atoms have one valence electron in the ground state?
A) alkali metals
B) alkaline earth metals
C) halogens
D) noble gases
126) In which group do all atoms have two valence electrons in the ground state?
A) alkali metals
B) alkaline earth metals
C) halogens
D) noble gases