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Chapter 2: Atomic Structure and Chemical Bonding

1 Chapter 21 Chapter 2: Atomic Structure and Chemical Bonding Materials Molecules Atoms Atoms = protons (p) + neutrons (n) + electrons (e) Protons and neutrons are made of quarks Quantitative measurements need units: metricor (SystemeInternational) or mks(meter-kilogram-second) unitsmeter (m) for lengthcubic meter (m3) for volumekilogram (kg) for massKelvin (K) for temperaturesecond (s) for timemole (mol) for amount of substanceChapter 22 Typical parameters.

Covalent Nondirected bonding, giving structures of high coordination; no electrical conductivity at low temperature LiF, NaCl, 5-10 CsCl Ionic Typical Distinct characteristics energies, eV/atom Bond type Examples Chapter 2 16 2.5 Ionic bonding NaCl Na 1s 22s p63s Cl 1s 2s2p63s2p5 Na+ 1s 22s 2p6 Cl-1s 2s p63s2p6

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