CHM-1045 Lecture Notes - Lecture 4: Alkaline Earth Metal, Alkali Metal, Transition Metal
17 Nov 2017
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Proust-law of definite proportion ( or constant proposition): different samples of the same substance always contained the same elements in the same proportion. In another way, for example every can of soda has the same amount of soda, and made with the same quantity of material and weight the same. Dalton law of multiple proportion: when element react to make a compound, they shared a common whole number ratio. Thomson discovers the electrons using the cathode ray method. Millikan determined the mass and charge of the electron. Thomson used the plum pudding model to discover the proton. Rutherford discover the nucleus and found that. Most of the mass are concentrated there. The electron surround the nucleus in energy level. Element in the same group have the similar property. Malleable, conduct electricity, shiny, ductile, high melting and boiling point. Nonmetal are found on the right side of the periodic table.
