What are the unknown elements of Mendeleev's Lab of 1869?

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2026-05-08 22:55

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=unknown 1: silicon/unknown 2: neon/unknown 3: rubidium/unknown 4: krypton/unknown 5: gold/unknown 6: strontium/unknown 7: magnesium/unknown 8:cesium/unknown 9: thallium==are those the answers?=

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