01:160:161 Chapter Notes - Chapter 1.4-1.9: Antoine Lavoisier, Joseph Proust, Atomic Number
27 Sep 2018
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The first to propose that matter was composed of small, indestructible particles were leucippus and his student democritus. They named these small, indestructible particles atomos. The three most important laws that led to the development and acceptance of the atomic theory are: the law of conservation of mass. In a chemical reaction, matter is neither created nor destroyed. When a chemical reaction occurs, the total mass of the substances involved does not change. The particles rearrange during a chemical reaction, but the number of particles is conserved because the particles themselves are indestructible: the law of definite proportions. All samples of a given compound, regardless of their source or how they were prepared, have the same proportions of their constituent elements. Ratio is the same for any amount. When two elements (call them a and b) form two different compounds, the of element b that combine with 1g of element a can be expressed as a ratio masses of.
