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1st lecture - ■ compound =can be decomposed into elements...

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8/28 Chemists want to create things with specific properties that perform a specific action—connect structure of atoms and molecules to properties. Atoms fundamental building block---ancient Greeks couldn't prove it Dalton (late 1700s-1800s) came up with the same concept based on lab observations in a chemical change, mass is not being destroyed or created—conserved Lavoisier mass unchanged chemical compounds decomposed---yields fixed mass ratios of elements(can't be decomposed into more fundamental stuff by chemical process
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Unformatted text preview: ■ compound =can be decomposed into elements ■ Ex: water---hydrogen+oxygen. Mass H/ mass O=(approximately) 1/8 Dalton was looking for a model to explain these---■ Dalton's Atomic Theory elements are made of fundamental building blocks called atoms atoms of different elements have different mass atoms combine in simple whole # ratios to make compounds(1:1, 1:2, 2:3) air Metallic tin heat Tin oxide...
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