ENGN45_Quiz1-B

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City College of San Francisco *

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Course

45

Subject

Material Science

Date

Dec 6, 2023

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pdf

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9

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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!
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
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