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Lecture

The Chamical Basis of Life I: Atoms, Molecules and Water

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Department
Biology
Course
BIOL 1F90
Professor
Doug Bruce
Semester
Fall

Description
The Chemical Basis of Life I Atoms Molecules and Waterimportant to understand the behaviour of biological moleculesmolecules are made of atoms protons neutrons electronsatoms have no electric chargeGold Foil ExperimentRutherford shot He nucleiparticles at a gold foil particles and nuclei both positively charged therefore when interacting they will repel each other98 went through the gold2 slightly deflected passed close enough to nuclei to be effected001 bounced backTherefore MATTER IS EMPTY SPACEOrbitalss are sphericalp are dumbell shapedeach orbital can hold only 2 electronsatoms with more than 2 electrons has more than one orbitalmore electronsgreater and greater distance from centre of nucleus electrons vary in amount of energyenergy the capacity to cause changepotential energy electrons that are further away have moreenergy that matter possesses because of its location and structureelectrons behaviour is driven by need to complete shells
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