Updated Hubbard Periodic Chart of the Atoms
W. M. Welch Science Company 1963 version of the 1924 chart, by William F. Meggars
AlexanderDESIGN
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last update 4/14/16
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Updated Hubbard Periodic Chart of the Atoms
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W. M. Welch Science Company 1963 version of the 1924 chart, by William F. Meggars |
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AlexanderDESIGN
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