百度试题 结果1 题目25 Bromine is in Group VIl on the Periodic Table.Which describes the appearance of bromine at room temperature?C A grey solid B purple fumes C red-brown liquid D yellow gas 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
Which of the following is a liquid at room temperature View Solution View Solution View Solution View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions KC Sinha Solutions for Maths Cengage Solutions for Maths DC Pandey Solutions for Physics HC Verma Solutions for Physics...
Which of the following metals is a solid at room temperature, yet melts in your hand? a) gallium b) cesium c) sodium d) magnesium Elements: Each element in the periodic table has its own physical and chemical properties that are ut...
At room temperature the chemical bromine is in which state? What state of matter is argon? Which state of matter is NaNO3 in? (a) Solid (b) Liquid (c) Gas (d) Plasma What state of matter is germanium? What state is sulfur at room temperature?
It is solid at room temperature but when it comes in contact with caesium, mercury, and rubidium, it becomes liquid (when heated slightly). This element has been considered as a possible heat exchange medium in nuclear reactors. Certain Facts About Gallium When Gallium is added to certain meta...
The yellow block of elements in the centre of the table is known as transition metals. These elements are very useful as they conduct electricity and are mostly solid at room temperature. Halogens – Group 7 Halogens are the elements in light purple. The halogen column is the only column ...
It's polar. If we're thinking of the same structure (Br)2-N-N-(Br)2, then the bromines lower the electron density of the nitrogen atoms, creating a dipole moment. Does N2 contain polar bonds? Both the atoms are the same in the molecule, with no electronegativity difference, so elect...
Among obtained compounds the best antibacterial activity in the agar disc diffusion test showed derivative 21 with bromine group into the basic coumarin structure. The zones of growth inhibition for E. coli and S. aureus had a diameter of 20 mm and 24 mm respectively at the compound ...
LAS is rapidly and efficiently converted to its methylsulfonate ester by derivatization with trimethoxyorthoacetate at room temperature and separated as in Figure 3. Sign in to download full-size image Figure 3. Chromatogram of methyl esters of C10–C13 linear alkylbenzene. Column 25 m×0.2 mm i...
is typical of several “DFG-in” inhibitors; however, a bromine substituent on the benzene ring of the scaffold, directed at the DFG flanking residue Ala273, is responsible for induced-dipole forces along the Ala273 side chain, which in turn are thought to induce the closing of the A-loop...