lect6prt - J J Thomson Nobel Prize 1906 Cathode ray...

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J J Thomson Nobel Prize 1906 Cathode ray inseparable from the negative charge. Negative charge has mass about 1/2000 th of the atom. ATOMS are DIVISIBLE
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Thomson’s Plum Pudding Model of the Atom Positively charged bulk Negatively charged electrons
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How small is the atom? What is the mass of (anything)? Very small.
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Given one mole of hydrogen atoms (1 gram, or about 6 × 10 23 atoms) and that each atom (as we will learn) has a diameter of about 1 Å (10 -10 m), one mole of hydrogen atoms in a single-file line would reach from Ithaca to: A. New York City B. The Moon C. The Sun D. Pluto E. Alpha Centauri (4 light years away)
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Wilhlem Conrad Röntgen Nobel Prize 1901 The first one! Frau Röntgen’s hand and ring
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X-ray of fish, 1986 X-ray of crocodile, showing cause of death, 1986 A book that never made it to a 2 nd edition: GYNECOLOGICAL ROENTGENOLOGY. :Annals of Roentgenology Vol. 13 (1931) by Julius Jarcho
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Robert Millikan Nobel Prize 1923 In 2002, voted third most beautiful physics experiment ever! Oil droplets pick up charge.
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lect6prt - J J Thomson Nobel Prize 1906 Cathode ray...

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