SIT
发表于 2025-3-26 23:59:47
Aluminum (Al) Despite its abundance, it was considered a rare and expensive metal until 1886, when Charles M. Hall of the United States and Paul L. T. Héroult of France independently discovered an inexpensive system for obtaining pure aluminum by electrolysis of its oxide (Al.O.).
anesthesia
发表于 2025-3-27 03:40:01
Antimony (Sb) Gutenberg, the inventor of the printing press (1450), created his mobile type from an antimony and lead alloy, giving greater hardness to the lead and allowing it to be used multiple times in linotypes. At the same time, it permitted rapid melting in case of deterioration or the need for new fonts.
Fsh238
发表于 2025-3-27 06:47:46
Arsenic (As) Obtained from arsenopyrite (iron arsenic sulfide), from nickel, cobalt, copper, and lead sulfides, as well as from realgar and orpiment, and from copper sulfides with gold.
bromide
发表于 2025-3-27 12:03:11
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骂人有污点
发表于 2025-3-27 16:11:43
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engrossed
发表于 2025-3-27 20:43:45
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刺耳的声音
发表于 2025-3-28 00:04:36
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ALIAS
发表于 2025-3-28 03:36:38
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vibrant
发表于 2025-3-28 07:06:12
Cadmium (Cd) A by-product of the extraction of zinc from zinc sulfides such as sphalerite.
adroit
发表于 2025-3-28 13:17:04
Calcium (Ca) Stalactite and stalagmite formation in karst caves demonstrates the high of calcium carbonate content achieved over time by filtering water.