百度试题 结果1 题目What is the chemical symbol for nitrogen? A. N B. Ni C. Na D. Ne 相关知识点: 试题来源: 解析 a) Sun 反馈 收藏
Symbol N A nonmetallic element that makes up about 78 percent of the atmosphere by volume, occurring as a colorless, odorless gas. It is a component of all proteins, making it essential for life, and it is also found in various minerals. Nitrogen is used to make ammonia, nitric acid, TN...
1.The symbol foruranium. 2.The symbol forinternal energy. U4 abbr. 1.unsatisfactory 2.uracil u1 orU(yo͞o) n.pl.u'sorU'salsousorUs 1.The 21st letter of the modern English alphabet. 2.Any of the speech sounds represented by the letteru. ...
The recovered embryos were measured, photographed and immediately snap-frozen in liquid nitrogen. Endometrial samples were obtained by performing two trans-cervical uterine biopsies via an equine uterine biopsy forceps. The first biopsy was snap-frozen in liquid nitrogen and stored at − 80 °C ...
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What is the mass number for nitrogen? Answer and Explanation: The mass number of nitrogen is 14. The mass number, or atomic mass number, means the total number of neutrons and protons in the corresponding... Learn more about this topic: ...
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Which element is a metalloid? (a) iron (b) silicon (c) sodium (d) cadmium. Write the symbol for each of the following elements. (a) cobalt (b) sodium (c) iron (d) tin (e) antimony (f) nitrogen (g) copper (h) silver (i) mercury (j) gold ...
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