IB CHEMISTRY

Structure 2.4: Flashcards

Master the definitions: Alloys, Polymers, and Bonding.

#1

Bonding Triangle Axes

X: Average Electronegativity. Y: Difference in Electronegativity.

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#2

Why are alloys harder?

Different sized atoms disrupt the lattice, preventing layers from sliding over each other.

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#3

Addition Polymerization

Joining monomers with C=C bonds. 100% Atom Economy.

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#4

Condensation Polymerization

Joining monomers with 2 functional groups, releasing a small molecule (water/HCl).

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#5

Linkage in Polyester

Ester Link (-COO-)

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#6

Linkage in Polyamide

Amide Link (-CONH-)

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#7

Biodegradability Rule

Condensation polymers hydrolyze (biodegrade) due to polar links. Addition polymers do not (inert C-C backbone).

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#8

Intermediate Bonding Example

Silicon (Semiconductor) or SiC (Covalent/Metallic border).

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