百度试题 结果1 题目Which chemical element is used in making steel? A. Oxygen B. Carbon C. Nitrogen D. Hydrogen 相关知识点: 试题来源: 解析 B。碳元素被用于制造钢铁。氧元素主要用于呼吸作用等,氮元素用于保护食品等,氢元素用于能源等领域。
Which chemical element is important for making glass? A. Silicon B. Oxygen C. Nitrogen D. Hydrogen 相关知识点: 试题来源: 解析 A。硅是制造玻璃的重要元素。氧在很多方面有作用但不是制造玻璃的关键元素,氮和氢在其他领域有应用。反馈 收藏
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In a simple chemical experiment, which element is usually in a gaseous state? A. Sulfur B. Phosphorus C. Nitrogen D. Iron 相关知识点: 试题来源: 解析 C。在简单的化学实验中,氮气通常是气态,而硫和磷通常是固态,铁是固态金属。反馈 收藏 ...
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The chemical symbol for nitrogen is ___. A. Nitrogyn B. Nitrogen C. Nytrogen D. Nitrogon 相关知识点: 试题来源: 解析 B。A 选项拼写错误,y 后面应该是 e。C 选项拼写错误,n 后面应该是 i。D 选项拼写错误,y 后面应该是 e。B 选项是正确的氮气的英文名称拼写。反馈...
The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. These are the elements that tend to form gases even at very low temperatures. We might think of chondrites as samples of ...
Nitrogen is a nonmetallic chemical element. Odorless, tasteless, and colorless, nitrogen is found abundantly on Earth, but pure...
The scientific study of matter's characteristics and behaviour is known as chemistry.andare different from the normal vocabulary. It is a branch of natural science that examines the building blocks of matter, including the atoms, molecules, and ions that make up compounds and their composition, ...
What is the formula for 1 lithium atom, 1 nitrogen atom and 3 oxygen atoms If the formula of an oxide of element X is XO, what is the formula of the nitride of X? What is the formula for phosphorus acid? What is the chemical formula of a compound that contains Mg and Cl?