Mendeleef said about which metal
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Dmitri Mendeleev published the first periodic table of the chemical elements in 1869 based on properties that appeared with some regularity as he laid out the elements from lightest to heaviest.When Mendeleev proposed his periodic table, he noted gaps in the table and predicted that as-then-unknown elements existed with properties appropriate to fill those gaps.
bhanu76:
not mendeleev, mendeleef
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mandeleev said about gallium
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