9-11 chem chapter 1 notes.docx - 9-11 chem notes Chapter 1...

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9-11 chem notes Chapter 1 Early history of chemistry Greeks were the first to attempt to provide a reason behind chemical equations o They believed that all matter was composed of earth, air, fire, and water Alchemy was prevalent for the next 2000 years o Several elements were discovered o Methods to prepare mineral acids were developed Robert Boyle was the first “chemist” o Quantified the relationship between pressure and air 3 important laws 1. Law of conservation of mass o Mass is neither created nor destroyed o Stated by Antoine Lavosier 2. Law of definite proportion o A given compound always contains exactly the same proportion of elements by mass o Stated by Joseph Proust 3. Law of multiple proportions o When two elements form a series of compounds, the rations of the masses of the second element that combine with 1 gram of the first element can always be reduced to small whole numbers o Stated by John Dalton Dalton’s Atomic Theory 1808
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