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Gilbert cloud chamber, assembled An alternative view of kit contents. The lab contained a cloud chamber allowing the viewer to watch alpha particles traveling at 12,000 miles per second (19,000,000 m/s), a spinthariscope showing the results of radioactive disintegration on a fluorescent screen, and an electroscope measuring the radioactivity of different substances in the set.
The Johnny Horizon Environmental Test Kit was marketed to both boys and girls. [12] Well-known chemistry sets from the United Kingdom include the 1960s and 1970s sets by Thomas Salter Science (produced in Scotland) and later Salter Science, then the "MERIT" sets through the 1970s and 1980s. Dekkertoys created a range of sets which were similar ...
Following is a list of minerals that serve as copper ores in the copper mining ... Formula % Copper when pure Chalcopyrite: CuFeS 2: 34.5 Chalcocite: Cu 2 S: 79.8 ...
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Discovering STEM Physics Laws Set. Teach kids ages 8 and up about the laws of physics with this comprehensive science kit featuring six different projects, including a rubber band car, sharpening ...
Chalcolithic Age (copper age) beginning about 7,000 years ago: copper, gold, silver, mercury. In the early Bronze Age, lead was used with antimony and arsenic. [2] The use of meteoric iron–nickel alloy has been traced as far back as 3500 BC. Iron Age, Ancient Near East (1300–600 BC), India (1200–200 BC), Europe (1200 BC – 400 AD).
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