CHEM 121 FINAL EXAM | UPDATED QUESTIONS AND ANSWERS UPDATED .Buy Quality Materials!
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Course
CHEM 121
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CHEM 121
CHEM 121 FINAL EXAM | UPDATED QUESTIONS AND ANSWERS UPDATED .Buy Quality Materials!
In which set of elements would all members be expected to have very similar chemical properties?
D) O, S, Se
Which of the following is an isoelectronic series?
E) O2-, F-, Ne, Na+
Which isoelectronic series...
CHEM 121 FINAL EXAM | UPDATED QUESTIONS AND
ANSWERS UPDATED .Buy Quality Materials!
In which set of elements would all members be expected to have very similar
chemical properties?
D) O, S, Se
Which of the following is an isoelectronic series?
E) O2-, F-, Ne, Na+
Which isoelectronic series is correctly arranged in order of increasing radius?
C) Ca2+ < K+ < Ar < Cl-
Screening of the nuclear charge by core electrons in atoms is________ .
A) more efficient than that by valence electrons
The effective nuclear charge of an atom is primarily affected by ______.
D) inner electrons
The atomic radius of main-group elements generally increases down a group
because _______.
D) the principal quantum number of the valence orbitals increases
Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si
and Ar?
D) Na > Mg > Si > P > Ar
8) Which equation correctly represents the first ionization of aluminum?
E) Al (g) = Al+ (g) + e-
Of the choices below, which gives the order for first ionization energies?
D) Kr > Br > Se > Ge > Ga
Which of the following correctly represents the third ionization of aluminum?
B) Al+2 (g) = Al3+ (g) + e-
Which ion below has the largest radius?
E) Br-
The electron configuration belonging to the atom with the highest second
ionization energy is________.
A) (i) 1s2 2s2 2p6 3s1
The electron configuration of the atom with the most negative electron affinity is
______.
E) (v) 1s2 2s2 2p6 3s2 3p5
Of the following elements,_______ has the most negative electron affinity.
A) Cl
Which equation correctly represents the electron affinity of calcium?
C) Ca (g) + e- = Ca- (g)
Of the elements below,________is the most metallic.
E) cesium
The list that correctly indicates the order of metallic character is ______.
E) Sr > Ca > Mg
Which one of the following compounds would produce an acidic solution when
dissolved in water?
, E) CO2
Which one of the following compounds produces a basic solution when
dissolved in water?
C) Na2O
In nature, the noble gases exist as
C) monatomic gaseous atoms
Of the ions below, only_______has a noble gas electron configuration.
C) Cl-
Which of the following has eight valence electrons?
E) all of the above
In ionic bond formation, the lattice energy of ions _______as the magnitude of the
ion charges_______
and the radii ______.
C) increases, increase, decrease
Fe+2 ions are represented by ______.
B) [Ar]3d6
There are ______valence electrons in the Lewis structure of CH3OCH2CH3.
E) 26
The Lewis structure of N2H2 shows ______.
E) each nitrogen has one nonbonding electron pair
The Lewis structure of the CO32- ion is _______.
:O=C---:O:-----:O:
A valid Lewis structure of _______cannot be drawn without violating the octet
rule.
E) SeF4
A valid Lewis structure of _______cannot be drawn without violating the octet
rule.
E) ICl5
Why don't we draw double bonds between the Be atom and the Cl atoms in
BeCl2?
D) That would give positive formal charges to the chlorine atoms and a negative formal
charge to the beryllium atom.
Given that the average bond energies for C-H and C-Br bonds are 413 and 276
kJ/mol, respectively,
the heat of atomization of bromoform (CHBr3) is ________ kJ/mol.
D) 1241
Of the bonds C-C, C=C, and C::C, the C-C bond is_______.
E) weakest/longest
The basis of the VSEPR model of molecular bonding is ______.
C) electron domains in the valence shell of an atom will arrange themselves so as to
minimize repulsions
ClF3 has "T-shaped" geometry. There are ______ non-bonding domains in this
molecule.
A) 2
The electron-domain geometry of _______is tetrahedral.
E) all of the above except XeF4
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