First Lecture Notes Section 1.1 - 1.5

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Department
Chemistry
Course
CHEM 110
Professor
Joseph Bollinger
Semester
Fall

Description
11 Atomic Structure AtomsAtoms are the basic building blocksoComposition of AtomsoStructure of Atoms100500 pm in diameter1010mo100pm1A2210gHeaviest masses Composed of Proton Neutron ElectronoProtons and Neutrons are in the nucleusCompose most of the mass of the atomoElectrons are almost massless Volume of atom is cloud of space with rapidly moving electronsThe electron stay in the atom because they are attracted to the protons in the nucleusoElectrostatic ForcekQQ12Fel2rAtoms have the same number of protons and electronsneutral2410gAmuatomic mass unit or u 166054xThe same atoms with a different umber of neutrons are called isotopesAtomicMassIsotopemassfractunalnaturalabundance
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