Electronic Configurations and Examples -- A-level Chemistry
Electronic Configurations: The Blueprint of Atoms Before we embark on our journey into subshells and atomic orbitals, let's revisit...
top of page
Search
Yuzhe
- Jun 20, 2017
Types of molecules with polar bonds but no resulting dipole moment
There are many cases besides that of carbon dioxide where the bond polarities op- pose and exactly cancel each other. Some common types...
Yuzhe
- Jun 20, 2017
Bond polarity and dipole moments
(a) The charge distribution in the water molecule. (b) The water molecule in an electric field. (c) The electrostatic potential diagram...
Yuzhe
- Jun 11, 2017
Periodic trends - chemistry - 离子化能量和原子半径
Trends in ionisation energies (kJ/mol) for the representative elements. Atomic radii (in picometers) for selected atoms. Note that atomic...
Yuzhe
- Jun 11, 2017
The Aufbau principle and electron configurations
原子核外电子排布通常是中国学生化学学习初期的盲区。 #Chemistry
Yuzhe
- Jun 7, 2017
The atomic spectrum of hydrogen - chemistry/化学
This spectrum as shown in (a), like the rainbow produced when sunlight is dispersed by raindrops, contains all the wavelengths of visible...
Yuzhe
- Jun 7, 2017
Coal conversion - chemistry/化学
碳元素无疑整个地球中最重要的元素，而煤炭也是碳元素在🌍中最重要的表现形式。 Coal gasification. Reaction of coal with a mixture of steam and air breaks down the large...
Yuzhe
- Jun 7, 2017
Standard enthalpies of formation - chemistry/化学
我们通过CH4和O2反应来计算化学反应中能量的转化 #Chemistry
Yu Zhe
- Jun 5, 2017
The kinetic molecular theory of gases - chemistry
在化学或物理热学里掌握以下三种定律是最为关键的，记忆每一种方程式是徒劳的，因为你的瞬时记忆会很快消失。但如果你能对每一种定律的图解产生联想，那么学习的效率就会显著性提高。 #Chemistry
Yu Zhe
- Jun 1, 2017
Pressure - chemistry/physics
The unit mm Hg (millimeter of mercury) is often called the torr in honor of Torricelli. The terms torr and mm Hg are used interchangeably...
Yu Zhe
- Jun 1, 2017
Balancing equations of oxidation and reduction reaction - chemistry
我们用一个氧化还原反应来展示如何进行方程式配平： #Chemistry
Yu Zhe
- Jun 1, 2017
Characteristics of oxidation and reduction/氧化还原反应特征 - chemistry
我们看下以下的特征解释： #Chemistry
Yu Zhe
- Jun 1, 2017
Oxidation and reduction - chemistry
#Chemistry
Yu Zhe
- May 26, 2017
Acid-base titrations - Chemistry/化学
以下描述是整个酸碱滴定实验的英文解释： The titration of an acid with a base. (a) The titrant (the base) is in the buret, and the flask contains the acid...
Yu Zhe
- May 22, 2017
Precipitation - Chemistry - 沉淀反应
Reactant solutions: (a) Ba(NO3)2(aq) and (b) K2CrO4(aq). 如果大家尝试将分子式以离子形式展开，那么沉淀反应就会变得更容易理解了。 #Chemistry
Yu Zhe
- May 19, 2017
Electronegativity - 电负性 - Chemistry
负电性的理解会帮助我们对分子内的作用力更好的理解，而这也恰恰是中国学生比较难理解的地方。 The different affinities of atoms for the electrons in a bond are described by a property...
Yu Zhe
- May 17, 2017
Dilution - 溶液稀释
关于溶液稀释问题遵循的基本原则就是mole doesn't change at all。 Water is then added to achieve the molarity desired for a particular solution. This process...
Yu Zhe
- May 16, 2017
Wood produces alcohol - 化学实验
Wood can undergo decomposition to produce methyl alcohol. Procedure 1. Set up the distillation apparatus as shown in Figure 2. As you do,...
Yu Zhe
- May 10, 2017
Chemistry - mole and mass
我们来解决下mole 和 gram之间的关系是怎样的： 首先我们看下mole的英文定义：the mole as the number equal to the number of carbon atoms in exactly 12 grams of pure carbon...
Yu Zhe
- May 8, 2017
Atomic mass and atomic number - 元素周期表基础 - 1
Atomic mass in periodic table is equal to ‘atomic weight’ or ‘mass number’. Its unit is called atomic mass units (amu). Atomic number in...
bottom of page