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Showing posts with label
21 elements
.
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Showing posts with label
21 elements
.
Show all posts
Monday, September 3, 2012
209 years ago today...Dalton's 21 elements
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"Sept. 3, 1803: Dalton Introduces Atomic Symbols" by Randy Alfred September 3rd, 2008 Wired 1803: English chemist...
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