Compound Structure and Properties

Seven topics on why atoms stick together and what that predicts. Bonding as a spectrum of electron sharing, the potential-energy curve behind every bond, the lattices of ionic solids and the electron sea of metals, drawing Lewis diagrams, ranking resonance structures by formal charge, and predicting molecular shape with VSEPR.

Topics

2.1

Types of Chemical Bonds

Intramolecular Force and Potential Energy

Structure of Ionic Solids

Structure of Metals and Alloys

Lewis Diagrams

Resonance and Formal Charge

VSEPR and Bond Hybridization

Lesson

Diag

locked

Equations For every problem in this unit

Nonpolar covalent

ΔEN ≈ 0 — electrons shared evenly

Polar covalent

moderate ΔEN — unequal sharing, bond dipole

Ionic

large ΔEN — electrons essentially transferred

Metallic

cations in a shared, delocalized electron sea

Formal charge

FC = valence e− − (lone e− + ½ bonding e−)

Electron domains

domains = bonding groups + lone pairs

Best resonance form

formal charges nearest 0; negative on the more electronegative atom

Shape

electron geometry = all domains; molecular shape = atoms only

Unit 1 tools

Challenge bank

1 / 60

60 open-ended problems.

Read the question, work it out, then flip the card to compare your reasoning to the worked solution. Mark each card so you can return to the ones that still bite.

Question

Tap card to reveal explanation

Worked solution

Tap card to return to question

Cumulative assessment

Test the unit.

Twenty mixed items pulled from across all 7 topics. Identifies which misconceptions still bite when you cannot see which topic the question came from.