Nitrogen is an odorless, tasteless, colorless nonmetallic chemical element which appears in great abundance in the Earth's atmosphere. It also appears in a number of other compounds, and is a vital component of life on Earth for many organisms. In addition to inhaling nitrogen with every breath...
A. Fix nitrogen in the air B. Decompose organic matter C. photosynthesis D. Parasitism 相关知识点: 试题来源: 解析 A。固氮细菌的主要作用是将空气中的氮气固定。分解有机物不是固氮细菌的主要作用;光合作用不是固氮细菌的作用;寄生不是固氮细菌的作用。反馈...
Nitrogen Uses and Properties - Nitrogen is a diatomic gas with atomic number 7 and symbol N. Know the nitrogen atomic number, the atomic mass of nitrogen and atomic weight of nitrogen. Explore the Uses of Nitrogen.
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
Nitrogen mustard is a cytotoxic or anti-cancer chemotherapy medicine that is like nitrogen gas in chemical structure. It is also used as a chemical agent in developing weapons for warfare, where it is known as bis (2-chlorethyl) ethylamine or HN-1, bis (2-chlorethyl) methylamine or HN-2...
Nitrogen (N) is a key component of fundamental biomolecules. Hence, the cycling and availability of N is a central factor governing the extent of ecosystems across the Earth. In the organic-lean sediment porewaters underlying the oligotrophic ocean, where low levels of microbial activity persist ...
The nitrogen cycle is the system by which nitrogen is converted into different chemical forms, some usable to humans and animals and some not, as it circulates among the atmosphere, the land and the oceans. Encyclopaedia Britannica/Getty Images/HowStuffWorks Living things require nitrogen for ...
aNitrogen is what gives plants their green vibrancy, and is available in many different forms. Nitrogen is broken down into nitrates, which are water-soluable and absorbed through the roots. If you previously resorted to chemical fertilizers, be aware that most organic fertilizer is slow-release,...
Nitrogen is one the essential elemental components of life on Earth. Nitrogen is part of ourDNAand RNA, which by itself makes it very important for every living organism. The air that we breathe in is composed of approximately 78% nitrogen. However, all of that nitrogen is out of our reac...
aIn addition Illustrate what happens if not sufficient nitrogen purity is reached. 另外说明发生了什么如果不充足的氮气纯净被到达。[translate]