| chemical element |
a heavy bluish gray metallic element that bends easily. Source: galena, cerussite. Use: car batteries, pipes, solder, radiation shields. Symbol Pb
출처: encarta.msn.com/dictionary_1861625368/lead.html
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| chemical |
Category: General pregnancy Pregnancy documented by a blood or urine test that shows a rise in the level of the human chorionic gonadotropin (hCG) hormone. Find out more about Pregnancy, chemical: Articles | Books/products
출처: pregnancyandbaby.com/read/articles/2455.htm
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| chemical |
As broadly applied to the chemical industry, an element or a compound produced by chemical reactions on a large scale for either direct industrial and consumer use or for reaction with other chemicals.
출처: web.mit.edu/environment/ehs/topic/HazCommTerms.htm...
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| chemical formula |
A description that uses numbers and symbols of elements to describe the propor
출처: www.nksd.net/schools/nkhs/staff/john_daneau/cp_glo...
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| chemical |
The ratio of elements in a substance. For example: the chemical formula of common salt is NaCl, sodium and chlorine in a ratio of 1:1.
출처: www.fisicx.com/quickreference/science/glossary.htm...
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