MAT E 273 Exam 1 (ISU) questions well
answered to pass
Which type of bonding generally results in positional constraints on atoms due to
the shapes of their valence electron orbitals? - correct answer ✔✔Covalent
Which of the following bonding scenarios features charged atom cores
surrounded by free electrons?
(a) Covalent (b) Ionic (c) Metallic (d) Hydrogen (e) Van der Waals - correct answer
✔✔Metallic
_________ bonding is responsible for binding separate sheets of graphene
together to form graphite. - correct answer ✔✔Van der Waals
_________ bonding is responsible for binding separate water molecules together
to form a crystal of ice. - correct answer ✔✔Hydrogen
Which of the following systems is not expected to feature bonds between atoms
whose valence electron orbitals are sp3 hybridized ?
(a)Silicon
(b) Germanium
(c) Bronze [Cu&Sn alloy]
(d) Carbon [Diamond]
(e) Si-Ge Solid Solution - correct answer ✔✔(c) Bronze [Cu&Sn alloy]
, The most commonly produced structural form of metals can be described as: -
correct answer ✔✔Random Polycrystal
Identify the valid unit cell that conveys the highest symmetry of the following 2-D
lattice - correct answer ✔✔(Hexagon)
What is the coordination number of any aluminum (Al) atom in a defect-free piece
of aluminum at a pressure of 1 atmosphere and a temperature of 0oC ? - correct
answer ✔✔12 (FCC)
How many total iron (Fe) atoms reside with a unit cell of iron that is at 0oC and 1
atmosphere of pressure ? - correct answer ✔✔2
Which crystal structure(s) feature an atomic packing factor (APF) of 74%. - correct
answer ✔✔FCC & HCP
The mobility of ___________ generally dictates the mechanical properties of most
metals that are near room temperature and under an ambient pressure of 1
atmosphere. - correct answer ✔✔Dislocations
Compute the theoretical density of Molybdenum (Mo) metal (under STP
conditions), given that its atomic radius is 0.1363 nm and its atomic weight is
95.94 g/mol. - correct answer ✔✔10.22 g/cm3
Laboratory furnaces sometimes feature glass windows that allow visual inspection
of a sample during a heat treatment. Such windows are often a source of leakage
for the gas(es) contained within the furnace. Consider a 3 mm thick sheet of
silicate glass that has a cross-sectional area of 600 mm2 that is used for a window.
Compute the steady-state flow rate of helium gas (magnitude, in atoms per
answered to pass
Which type of bonding generally results in positional constraints on atoms due to
the shapes of their valence electron orbitals? - correct answer ✔✔Covalent
Which of the following bonding scenarios features charged atom cores
surrounded by free electrons?
(a) Covalent (b) Ionic (c) Metallic (d) Hydrogen (e) Van der Waals - correct answer
✔✔Metallic
_________ bonding is responsible for binding separate sheets of graphene
together to form graphite. - correct answer ✔✔Van der Waals
_________ bonding is responsible for binding separate water molecules together
to form a crystal of ice. - correct answer ✔✔Hydrogen
Which of the following systems is not expected to feature bonds between atoms
whose valence electron orbitals are sp3 hybridized ?
(a)Silicon
(b) Germanium
(c) Bronze [Cu&Sn alloy]
(d) Carbon [Diamond]
(e) Si-Ge Solid Solution - correct answer ✔✔(c) Bronze [Cu&Sn alloy]
, The most commonly produced structural form of metals can be described as: -
correct answer ✔✔Random Polycrystal
Identify the valid unit cell that conveys the highest symmetry of the following 2-D
lattice - correct answer ✔✔(Hexagon)
What is the coordination number of any aluminum (Al) atom in a defect-free piece
of aluminum at a pressure of 1 atmosphere and a temperature of 0oC ? - correct
answer ✔✔12 (FCC)
How many total iron (Fe) atoms reside with a unit cell of iron that is at 0oC and 1
atmosphere of pressure ? - correct answer ✔✔2
Which crystal structure(s) feature an atomic packing factor (APF) of 74%. - correct
answer ✔✔FCC & HCP
The mobility of ___________ generally dictates the mechanical properties of most
metals that are near room temperature and under an ambient pressure of 1
atmosphere. - correct answer ✔✔Dislocations
Compute the theoretical density of Molybdenum (Mo) metal (under STP
conditions), given that its atomic radius is 0.1363 nm and its atomic weight is
95.94 g/mol. - correct answer ✔✔10.22 g/cm3
Laboratory furnaces sometimes feature glass windows that allow visual inspection
of a sample during a heat treatment. Such windows are often a source of leakage
for the gas(es) contained within the furnace. Consider a 3 mm thick sheet of
silicate glass that has a cross-sectional area of 600 mm2 that is used for a window.
Compute the steady-state flow rate of helium gas (magnitude, in atoms per
