摩尔计算 摩尔是高中出来的新概念,涉及到摩尔的计算是很多同学觉得非常困难的计算,实际上,摩尔就和Kg,cm一样,是个单位,能够连接宏观(Solid、Liquid 和 Gas)和微观(atom、 ion and molecule)的一座桥梁。比如我们都知道金属铁是由铁原子组成的,那么1g Fe是由多少Fe 原子组成的呢,这时候就会涉及到mole 的计算。...
According to the present invention, an organic EL element having excellent emission efficiency is obtained by designing a molecule while focusing attention to the fact that compounds having a central benzene backbone provide excellent stability and durability to a thin film and that the refractive ...
atom系一种element入面最细而且不能分割的部份,而Ion是由于atom/molecule得到或者失去electron时而令atom/molecule中的正负电荷失衡,得到净正或负电荷,咁ion都系element入面最细而且不能分割的部份?polyatomic ion系多过一个 atom 的 ion,咁他算不算系compound?
In sulfur, allotropy arises from two sources: (1) the different modes of bonding atoms into a single molecule and (2) packing of polyatomic sulfur molecules into different crystalline and amorphous forms. Some 30 allotropic forms of sulfur have been reported, but some of these probably represent...
(meaning a molecule consisting of one atom of an actinoid with five atoms of a halide) and MX6, as well as complexes of the type having the molecular formulas MX6−, MX72−, and MX83−for the +5 states and MX7−and MX82−for the +6 states. Neptunium(VII) and plutonium(...
PURPOSE:A guest-host type liquid crystal composition, containing a guest molecule having the molecular length equal to or longer than that of a triazo dye, and capable of multiplex driving. CONSTITUTION:A guest-host type liquid crystal c... S Yoshihiro 被引量: 0发表: 1997年 ...
Magnesium is essential for good health in both plants and animals. It forms part of the chlorophyll molecule found in all green plants. Chlorophyll is the molecule in green plants that controls the conversion of carbon dioxide and water to carbohydrates, such as starch and sugar. Plants that do...
发明人: 松居 恵理子 摘要: PROBLEM TO BE SOLVED: To provide a functional molecular element having a novel structure which can reduce contact resistance in the interface between a constituent molecule and electrodes, and also to provide its manufacturing method and a functional molecular device.收藏...
摘要: PROBLEM TO BE SOLVED: To provide a 3-5 group compound semiconductor low in a drive voltage and high in light emitting efficiency and besides stable in performance even when a cap layer forms a P-type.收藏 引用 批量引用 报错 分享 文库来源 求助全文 3-5 GROUP CHEMICAL SEMICONDUCTOR ...
where a polyacene skeleton is introduced in a molecule, the size of a π electron cloud between the molecules is increased and, therefore, an increase in charge mobility can be achieved. Accordingly, because the oligofluorene compound in accordance with the present invention has at least one nap...