Assessment: Chemical Bonding and Intermolecular Forces
Answer every question, then submit to see your score and which topics to review.
Part A — Concept Questions
Why do atoms form chemical bonds, according to the octet rule?
EasyWhat fundamentally distinguishes a covalent bond from an ionic bond?
MediumWhy is hydrogen bonding unusually strong compared to other intermolecular forces?
MediumPart B — Formula & Application
Potassium has an electronegativity of 0.82; oxygen has 3.44. Find ΔEN for a K–O bond.
MediumNitrogen has an electronegativity of 3.04; hydrogen has 2.20. What kind of bond is N–H?
MediumPart C — Problem Solving
Calcium (group 2) reacts with chlorine (group 17) to form an ionic compound. What is the correct formula, and why?
HardA solid crystal is hit with a hammer and shatters into pieces along flat planes, rather than denting or bending. What type of bonding does this most strongly suggest?
HardPart D — Real-Life Application
Copper wire is used for household electrical wiring rather than an ionic solid like table salt. Why?
MediumPart E — Challenge
Carbon dioxide (O=C=O) has two polar C=O bonds, yet the overall molecule is nonpolar. What explains this?
Hard0/9 answered