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Germanium is a chemical element; it has symbol Ge and atomic number 32. It is lustrous, hard-brittle, grayish-white and similar in appearance to silicon. It is a metalloid (more rarely considered a metal) in the carbon group that is chemically similar to its group neighbors silicon and tin. Like silicon, germanium naturally reacts and forms ...
The carbon group is a periodic table group consisting of carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl). It lies within the p-block. In modern IUPAC notation, it is called group 14. In the field of semiconductor physics, it is still universally called group IV.
Germanium (32 Ge) has five naturally occurring isotopes, 70 Ge, 72 Ge, 73 Ge, 74 Ge, and 76 Ge. Of these, 76 Ge is very slightly radioactive, decaying by double beta decay with a half-life of 1.78 × 10 21 years [4] (130 billion times the age of the universe). Stable 74 Ge is the most common isotope, having a natural abundance of approximately ...
China's exports of germanium, including wrought and unwrought products, tumbled in the first five months of this year 55% from the same year-ago period to 11.08 tons, even as the value of ...
China has the second-largest financial assets in the world, valued at $17.9 trillion as of 2021. [59] As of 2022, China was second in the world in total number of billionaires. [60] and second in millionaires with 6.2 million. China has the largest middle-class in the world, with over 500 million people earning over RMB 120,000 a year. [61]
Yunnan Chihong Zinc and Germanium Company Limited (SSE: 600497) is the state-owned enterprise engaged in the processing, extracting, and prospecting and trading of zinc, lead, germanium, and sulfuric acid products. The company was founded in Qujing, Yunnan, China, in 2000. It was listed on the Shanghai Stock Exchange in 2004.
The discoveries of the 118 chemical elements known to exist as of 2024 are presented here in chronological order. The elements are listed generally in the order in which each was first defined as the pure element, as the exact date of discovery of most elements cannot be accurately determined. There are plans to synthesize more elements, and it ...
The rare earth industry in China is a large industry. Rare earths are a group of elements on the periodic table with similar properties. Rare earth metals are used to manufacture technologies including electric vehicles (EVs), wind turbines, consumer electronics and other clean energy technologies. Rare earth elements are also important to national governments because they are used in the ...