03+History+of+Atoms

toc Below is the PowerPoint used during lecture.
 * This PowerPoint covers everything on the test except Millikan. Remember he used the cathode ray to discover the that the electron was about 1800 times less massive than the proton. Because of his work and Thompson's work, scientist knew they were look in for a massive, positively charged part of the atom.**

Video:
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PowerPoint used in the video:
media type="custom" key="4416859" The last slide that will not show on this page is

The Symbol for Atomic Number is "**Z**". **Atomic # equals # of protons and equals # electrons.** **mass #** = Atomic mass on Periodic Table Rounded Off to the nearest whole number. **Amu** is Atomic Mass Unit and is = to the mass of a proton.