我是中国人 不说外国话 英语不及格 因为我爱国 使阴、阳离子结合成化合物的静电作用。离子键 离子键是由电子转移（失去电子者为阳离子，获得电子者为阴离子）形成的。即正离子和负离子之间由于静电引力所形成的化学键。离子既可以是单离子，如Na+、CL-；也可以由原子团形成；如SO4 2-，NO3-等。离...
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aProvide a designated exterior smoking area (protected from the elements) that is sufficiently distant from construction activities 提供从建筑活动是 (充足地遥远的免受) 元素保护的一个选定的外部吸烟区[translate] aevery moment of my life 正在翻译,请等待...[translate] ...
What chemical elements make up an amethyst? Which silicate minerals separate easily into sheets when they break? What are common ferromagnesian silicate minerals? What are two elements that are in all silicate minerals? What is the crystal structure of graphene?
They are soluble and insoluble. They have a cleansing effect, as they remove a number of toxins accumulated in the colon. Increase your water intake No matter how much water you drink a day, you can always use a little more. And drinking at least 2 liters, especially in the summer, ...
8.3.2.2 An acid soluble aluminum content of 0.015 % or more. 8.3.2.3 ... 8.3.2.4 ... 8.3.2.5 The analysis for the elements mentioned in 8.3.2.1, 8.3.2.2, 8.3.2.3, or 8.3.2.4 shall be included in the test report. I got a SA-516-70 certificate and only had aluminum content 0.04...
Pure substances can be elements or compounds. What effect do solid and liquid pure substances have on the equilibrium position when a gas is involved? Should the kinetic energy of solid water increase or decrease if it is being heated up?
What types of covalent bonds are present in a double bond? What elements are involved in ionic bonding, and how are they the same or different from those involved in covalent bonding? Write a summary of the properties of Covalent Compounds. What are some characteristics of an ionic bond and...
These signaling elements are cytoplasmically exposed and recognized by subunits of the COPII coat. Certain soluble cargo molecules depend on receptor-like proteins for efficient ER export, although signals that direct soluble cargo into ER-derived vesicles are less defined. 展开 ...
One of the principal elements ofthe difference between short-term and long-term memoryis that long-term memory stores information we are likely to need again in the future. Gut feelings arise from that well of information collected over our lifetimes. When the brain sends stress signals to the...