Chemical elements can be named after planets. Which element is named after Uranus? A. Uranium B. Platinum C. Potassium D. Phosphorus 相关知识点: 试题来源: 解析 A。铀(Uranium)是以天王星(Uranus)命名的。铂(Platinum)、钾(Potassium)、磷(Phosphorus)都不是以行星命名。
Chemical elements can be named after minerals. Which element is named after a mineral containing iron? A. Manganese B. Magnesium C. Mercury D. Molybdenum 相关知识点: 试题来源: 解析 A。锰(Manganese)是以一种含有铁的矿物命名的。镁(Magnesium)、汞(Mercury)、钼(Molybdenum)都不是以含有铁的矿...
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The hardware was nickel-plated for a shiny finish. A five-cent coin in the US. He gave me a nickel as change. Nickel is a chemical element with the symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. ...
Which chemical element has the symbol Na? Which of these elements has atoms that have the strongest attraction to electrons in a chemical bond? a) Al b) Si c) P d) S How many electrons do halogens gain? What element has 10 electrons? What element has 13 electrons? What is the ...
Chemical elements may be named after famous scientists. Which element is named after Marie Curie? A. Curium B. Cadmium C. Calcium D. Carbon 相关知识点: 试题来源: 解析 A。锔(Curium)是以玛丽·居里(Marie Curie)和皮埃尔·居里(Pierre Curie)命名的。镉(Cadmium)、钙(Calcium)、碳(Carbon)都不是...
百度试题 题目The content of which chemical element is usually constant in a nucleic acid: _ A.CB.OC.ND.HE.P相关知识点: 试题来源: 解析 E 反馈 收藏
When electrons are introduced into the valence shell of an atom, the electron is stabilized as it is entering the attractive positive electric field of the atomic nucleus. The electron loses energy and this is liberated as electr...
a只要爱情不管经济 So long as love no matter economy[translate] aAnalysing chemical databases to identify active hits for specific biological targets still remains widely used. Which element contributes to the efficacy of the processes in terms of response enrichment rates 分析化工数据库辨认激活命中为...
Choose the BEST answer to the following. Which of these three elements has the most mass? (a) Hydrogen. (b) Iron. (c) Uranium. (d) Same in each. Comparing Atomic Masses of Elements: The atomic mass of an element is diff...