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Lecoq de Boisbaudran’s spectroscopic discovery and characterization of gallium supplied a prominent test of Mendeleev’s predicted eka-aluminium, with later density measurements improving agreement.
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Gallium’s observed properties substantially matched the predicted position and chemistry, while discrepancies such as the first density estimate were corrected by further measurement.
The source theory, law, entity, prediction, or structural claim is directly tested, supported, constrained, or established by the target experiment or observation. Experimental support is not final logical proof; the edge detail states exactly what was measured.
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