Calculate AxBxC
Look at the series (4, 6, 12, 18, 30, 42, 60, 72, 102, 108, A, B, C), determine the pattern, and calculate AxBxC.Correct answers: 31
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Axel Fredrik CronstedtBorn 23 Dec 1722; died 19 Aug 1765 at age 42. Swedish chemist and metallurgist who was the first to isolate nickel (1751) and notice its slight magnetic properties. A new chemical classification of minerals he made was translated to several languages. Patterns he found in the internal structure of minerals enabled him to distinguish between simple one-compound minerals and those comprised of a mixture of several minerals. He discovered zeolite, a water-softening silicate and analysed the high-density mineral calcium tungstate. By adept use of the blowpipe to intensify a flame and burn a small quantity of a mineral he could make an identification of its chemical composition based on the colouring of the flame. He did not invent the instrument, but founded systematic blowpipe analysis technique.« |