chemical properties of germanium
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chemical properties of germanium
what are germanium chemical properties
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physical and chemical properties of germanium
common family properties of germanium
what type of element is germanium
what kind of element is germanium
optical properties of germanium
what is the density of germanium
properties of germanium and silicon
atomic structure of germanium
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is germanium an element
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germanium in the periodic table
what is germanium classified as
germanium is a metal
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