Ch.9 - Bonding & Molecular StructureWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Sections
Chemical Bonds
Lattice Energy
Lattice Energy Application
Born Haber Cycle
Dipole Moment
Lewis Dot Structure
Octet Rule
Formal Charge
Resonance Structures
Additional Practice
Bond Energy

Solution: These species do not obey the octet rule. Draw a Lewis structure for each, and state the type of octet-rule exception:(a) PF6−

Solution: These species do not obey the octet rule. Draw a Lewis structure for each, and state the type of octet-rule exception:(a) PF6−

Problem

These species do not obey the octet rule. Draw a Lewis structure for each, and state the type of octet-rule exception:

(a) PF6

Solution
  • A molecule that doesn't obey the octet rule may have less or more than 8 electrons on its valence shell
  • For PF6-, will appear as central atom since its less electronegative than F
  • P has 5 valence electrons while F has 7. Total v.e is 48 (5(1) + 7(6) + 1 (from negative charge) = 48)
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