ENGN45_Quiz1-G.pdf

Quiz #1 Due No due date Points 10 Questions 10 Time Limit None Allowed Attempts Unlimited Instructions Attempt History Attempt Time Score KEPT Attempt 7 3 minutes 10 out of 10 LATEST Attempt 7 3 minutes 10 out of 10 Attempt 6 8 minutes 8 out of 10 Attempt 5 11 minutes 9.5 out of 10 Attempt 4 15 minutes 9.5 out of 10 Attempt 3 8 minutes 8.5 out of 10 Attempt 2 27 minutes 7.83 out of 10 Attempt 1 46 minutes 9.33 out of 10 Submitted Jan 20 at 3:05pm This quiz covers the Introduction to Materials and Atomic Bonding. Take the Quiz Again 1 / 1 pts Question 1 What is an amu? (Select all that apply.)

A unit of mass that is approximately equal to the mass of a proton or a neutron. Correct! Correct! A unit of mass equal to approximately 1.66 x 10^(-24) grams. Correct! Correct! The mass of one twelvth of a carbon12 atom. Correct! Correct! amu stands for atomic mass unit. Correct! Correct! All of the answers are correct. 1 / 1 pts Question 2 What is the relationship between the bonding force and the bonding energy of an atomic bond? The force is always greater than the energy. The energy is equal to the derivative of the force with respect to the separation distance. The energy is always greater than the force.

The force is equal to the derivative of the energy with respect to the separation distance. Correct! Correct! Yes, this is right. The mathematical relationship looks like: F = dE/da This relationship is the same for all three types of primary atomic bonds and also for secondary atomic bonds. 1 / 1 pts Question 3 The radius ratio of the elements in an ionic bond will be an important factor in determining which of the following? The type of defects present in the material. The melting temperature of the material. The type of atomic bonding present in the material. The crystalline structure of the material. Correct! Correct! Yes. Also, the need to maintain charge neutrality will also be a determining factor.

The radius ratio, along with the need to maintain charge neutrality will be the determining factors for the material's crystal structure. 1 / 1 pts Question 4 Pick the answer which, if put on the end of this sentence, makes it true: The relationship between bonding force and bonding energy for the different types of atomic bonding… looks like: E = dF/da is different for the three types of primary bonding but is the same for all the types of secondary bonding. depends on the types of materials that are being bonded. is the same for the three types of primary bonding but different for the secondary bonding forces. is the same for all the types of bonding, both primary and secondary. Correct! Correct! Yes. The bond force curve and the bond energy curve have the same general shape for all types of atomic bonding.

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