ENGN45_Quiz1-B
pdf
keyboard_arrow_up
School
City College of San Francisco *
*We aren’t endorsed by this school
Course
45
Subject
Material Science
Date
Dec 6, 2023
Type
Pages
9
Uploaded by DBStanley
Quiz #1
Due
No due date
Points
10
Questions
10
Time Limit
None
Allowed Attempts
Unlimited
Instructions
Attempt History
Attempt
Time
Score
KEPT
Attempt 1 46 minutes
9.33 out of 10
LATEST
Attempt 2 27 minutes
7.83 out of 10
Attempt 1 46 minutes
9.33 out of 10
Submitted Jan 20 at 2:16pm
This quiz covers the Introduction to Materials and Atomic Bonding.
Take the Quiz Again
1 / 1 pts
Question 1
Pick the best answer that is true for covalent bonding.
Correct!
Correct!
Covalent bonding is directional and does not maximize packing
efficiency.
Exactly!
Covalent bonding takes place between elements whose
electronegativities are far apart.
Covalent bonding is non-directional. Covalent bonding maximizes packing efficiency. 1 / 1 pts
Question 2
Pick the best answer that is true for secondary bonding.
Secondary bonding takes place between atoms or molecules that have
any type of dipole moments.
Correct!
Correct!
This is the correct answer.
Secondary bonding takes place between atoms or molecules that have
temporary dipole moments.
Secondary bonding takes place between atoms or molecules that have
fluctuating dipole moments.
Secondary bonding takes place between atoms or molecules that have
permanent dipole moments.
1 / 1 pts
Question 3
Pick the best answer that is true for metallic bonding.
Metallic bonding takes place between elements whose
electronegativities are far apart.
Metallic bonding maximizes packing efficiency. Metallic bonding is non-directional. Metallic bonding is non-directional and therefore maximizes packing
efficiency.
Correct!
Correct!
Exactly!
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
0.5 / 1 pts
Question 4
What is electronegativity? (Choose all that apply.)
The higher an element's value of electronegativity, the more
electronegative or nonmetallic, the element is. The lower the value of
electronegativity, the more electropositive or metallic, the element is.
Correct!
Correct!
It is the sum of all the negative charges of the electrons of an atom. It is the valance of an atom when it bonds with a positive ion. Electronegativity is an arbitrarily defined scale ranging from 0 to 4.1 that
measures the degree to which an atom attracts electrons.
orrect Answer
orrect Answer
0.5 / 1 pts
Question 5
What is an electron orbital? (Select all that apply.)
It is one of the discrete energy levels for electrons in the Bohr model of
an atom.
ou Answered
ou Answered
It is the energy state of an an electron orbiting around the nucleus of an
atom.
Correct!
Correct!
It is a probablility distribution of the position of an electron orbiting
around the nucleus of an atom.
Correct!
Correct!
It is a specific path of an electron orbiting around the nucleus of an
atom.
Electrons in an atom move more like a cloud surrounding the
nucleus rather than like an individual planet in orbit. In other
words the position of the electron in an atom is described by a
probability distribution around the nucleus rather than a specific
path. This probability distribution or “cloud” is called an electron
orbital
. There are different types of orbitals, each with a
distinctive shape.
1 / 1 pts
Question 6
What is a material property? (Select all that apply.)
An inherent characteristic of a material. Correct!
Correct!
A measurement that indicates how the material will respond to a
stimulus.
Correct!
Correct!
A standard definition created by a professional organization to quantify
material behavior.
Correct!
Correct!
0.83 / 1 pts
Question 7
What is the predominant type of atomic bonding that each materials
category has?
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
metals/alloys
metallic bonding
Correct!
Correct!
ceramics
ionic bonding (possibly w
Correct!
Correct!
glasses
ionic bonding (possibly w
Correct!
Correct!
composites
any combination of bond
Correct!
Correct!
semiconductors
covalent and secondary
ou Answered
ou Answered
ionic bonding
(possibly with
covalent character)
Correct Answer
Correct Answer
polymers
covalent and secondary
Correct!
Correct!
0 / 1 pts
Question 8
What is involved in the engineering of materials?
Selecting a material for a specific application or determining an
application a specific material can be used for.
ou Answered
ou Answered
Yes, this is correct. However, the processing of a material is also part of the engineering of materials.
Understanding the properties of a material. The processing and the applications for a material. orrect Answer
orrect Answer
The processing that a material is subjected to. Determining the basic structure of a material. 1 / 1 pts
Question 9
What is an important criteria when selecting a material for a specific
application? (Select all that apply.)
The potential the selected material has to deteriorate in the environment
in which it will be used.
Correct!
Correct!
The properties of the selected material must meet design specifications
of strength, durability, etc.
Correct!
Correct!
The impact the selected material will have on the environmental,
including all aspects of its life, from extraction and processing to
utilization and disposal.
Correct!
Correct!
Correct!
Correct!
The cost of the material including its extraction, processing and
disposal.
All of these criteria are important. The ranking will be determined
by the specific application.
1 / 1 pts
Question 10
To what does the science of materials refer?
A material's properties.
The applications that a material is used for. The structure and properties of a material. Correct!
Correct!
Exactly!
The basic structure of a material. The processing of a material. The science of materials refers to a material's basic structure
and its properties. The properties of a material will be a direct
consequence of its structure.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help