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Across 1. who predicted Germanium to exist? 3. The ____ of germanium is $.88 a gram. 7. What is germanium named after? 9. Germanium tetrachloride is a ________ used as a reagent in fiber optics. 10. _________ is found in argyrodite, coal, germanite, zinc ores, and other minerals. 11. Germanium was aslo used in _________ communication networks. 12. Germanium is also used in infrared ________ systems. 13. Germaium is a _________.

Down 1. The ________ of germanium is 535 g/cm. 2. The existence of this element was proven in what year? 4. The development of the germanium________opened the door to countless applications of solid state electronics. 5. The ________ of germanium is 72.59 6. This is the chemical formula for what? GeO2 8. The ________of germanium is 947 c