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Chemestry 10

QuestionAnswer
(1829)Observed groups of three elements that were similar. Johann D.
(1863) Noticed every 8 element was similar when listed in order by atomic mass. John N.
(1917) Used periodic table but placed elements in order by number of protons/atomic number Henry M.
(1869) Placed elements in order by atomic mass and found similar elements were repeating patterns. Demetri M.
Created by: 503959930
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