ENGN45_Quiz1-F

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Quiz #1 Results for Monica Mendoza Submitted Jan 20 at 3:01pm 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! The mass of one twelvth of a carbon12 atom. Correct! Correct! A unit of mass equal to approximately 1.66 x 10^(-24) grams. Correct! Correct! amu stands for atomic mass unit. Correct! Correct! All of the answers are correct. 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 permanent dipole moments. 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. 1 / 1 pts Question 3 Choose the best answer that is true pertaining to ionic bonding. Ionic bonding takes place between elements whose electronegativities are far apart. Ionic bonding maximizes packing efficiency.

Ionic bonding is non-directional. Ionic bonding is non-directional, maximizes packing efficiency and takes place between atoms whose electronegativities are very different. All of these answers are true. Correct! Correct! 1 / 1 pts Question 4 What is Quantum Mechanics? It is a theory that addresses the fact that matter has wave-like properties in addition to particle-like properties and the fact that waves have particle-like properties in addition to their wave-like properties. Correct! Correct! It is a theory that predicts probabilities in situations where classical mechanics predicts certainties. Correct! Correct! It is a set of principles and laws that govern all physical systems; however, it is most relevant for systems of atomic and subatomic entities. Correct! Correct! Correct! Correct!

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