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CH301 Conference Course Packets: Solutions

CH301 Conference Course Packets: Solutions - CH108...

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CH108 - Intensive Chemistry Seminar – Fall 2008 worksheet #1 Solutions 1. Provide an example for each of the following: mixture, compound, element. mixture: air, dirt compound: carbon monoxide, sodium chloride element: nitrogen, oxygen, helium 2. Outline Dalton’s atomic theory of matter. - All matter consists of indivisible atoms - Atoms of a given element are identical in all properties - Different atoms consist of different atoms which have different masses - Atoms are indestructible and retain their identities in chemical reactions - Compounds form from elements through the combination of atoms of unlike elements in small whole number ratios. 3. a) The most convincing evidence for the existence of electrons came from the Thomson experiment. Discuss the two major conclusions of this experiment. The existence and charge to mass ratio of a negatively charged particle named the electron b) What did Robert Millikan determine in his “oil drop experiment”? The charge of the electron. c) The scientist who first determined the e/m ratio for electrons was Thomson .
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