CHEM 0110 Chapter Notes - Chapter 2: Geiger Counter, Elementary Charge, Polonium
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A pure compound, whatever its source, always contains definite or constant proportions of the element by mass. Basic theory: all matter, whether element, compound, or mixture, is composed of small particles called atoms. All matter consists of indivisible particles called atoms. Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compounds. Atoms of same element can combine in more than one ratio to form two or more compounds. The atom is the smallest unit of matter that can take part in a chemical reaction. When two elements form more than one compound, the masses of one element in these compounds for a fixed mass of the other element are in rations of small whole numbers. Robert millikan and the oil drop experiment.
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