Standard Level Content
Unit 5  ·  IB Chemistry

Chemical Bonding

Analysis of the electrostatic forces that hold atoms together in ionic, covalent, and metallic structures.

SL HL ~ hrs
1 H 1.008
6 C 12.011
29 Cu 63.546
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Video Instruction

5 Lessons Available

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Covalent Bonding and Properties of Covalent Compounds
IB Chem 1 Paper Chromatography
Intermolecular Forces
Ionic Bonding and Properties of Ionic Compounds
Lewis Structures_VSEPR Theory_Metallic Bonding and Alloys
12 Mg 24.305
10 Ne 20.180
Ionic Bond
Electrostatic attraction between oppositely charged ions formed by electron transfer.
Covalent Bond
Electrostatic attraction between a shared pair of electrons and the nuclei of both atoms.
Metallic Bond
Electrostatic attraction between a lattice of positive metal ions and delocalized 'sea' of electrons.
VSEPR Theory
Model used to predict the geometry of molecules based on minimizing electron repulsion.
Intermolecular Force
The forces of attraction or repulsion which act between neighboring molecules.
Dipole-Dipole
Attraction between the positive end of one polar molecule and the negative end of another.
Hydrogen Bond
Strong dipole-dipole attraction when H is bonded directly to N, O, or F.
London Dispersion Forces
Temporary dipole-induced dipole attractions found between all molecules.
Polarity
The distribution of electrical charge over a molecule or bond ($dipole$).
Octet Rule
The tendency of atoms to prefer to have eight electrons in their valence shell.
Coordinate Covalent Bond
A covalent bond where both electrons in the shared pair come from the same atom.
Resonance
The use of multiple Lewis structures to represent a single molecule with delocalized electrons.
Giant Covalent Structure
A massive lattice of atoms held together by covalent bonds ($e.g. \text{diamond, silica}$).
Allotrope
Different structural forms of the same element in the same physical state ($e.g. \text{graphite vs diamond}$).
Bond Enthalpy
The average energy required to break one mole of a specific bond in gaseous molecules.
26 Fe 55.845
79 Au 196.967
17 Cl 35.45