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Percentage Yield In a lot of reactions, not all reactants react to form products which can be due to several factors: Other reactions take place simultaneously The reaction does not go to co...
AQA A Level Chemistry复习笔记1.2.3 Balanced Equations
Deducing Formulae of Compounds Ionic compounds are formed from a metal and a non-metal bonded together Ionic compounds are electrically neutral; the positive charges equal the negative charg...
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AQA A Level Chemistry复习笔记1.2.2 Empirical & Molecular Formula
Empirical & Molecular Formulae The molecular formula is the formula that shows the number and type of each atom in a molecule E.g. the molecular formula of ethanoic acid is C2H4O2 ...
AQA A Level Chemistry复习笔记1.1.7 Ionisation Energy: Trends & Evidence
Ionisation Energies: Equations The second ionisation energy (IE2) is the energy required to remove the second mole of electrons from each +1 ion in a mole of gaseous +1 ions, to form one mol...
AQA A Level Chemistry复习笔记1.1.6 Ionisation Energy
Ionisation Energies The Ionisation Energy (IE) of an element is the amount of energy required to remove one mole of electrons from one mole of gaseous atoms of an element to form one mole of...
AQA A Level Chemistry复习笔记1.1.5 Electron Configuration
Deducing the Electron Configuration The Periodic Table is split up into four main blocks depending on their electron configuration Elements can be classified as an s-block element, p-block e...
AQA A Level Chemistry复习笔记1.1.4 Shells and Orbitals
Electron Shells Shells The arrangement of electrons in an atom is called the electron configuration Electrons are arranged around the nucleus in principal energy levels or principal quantum ...
AP预备微积分与不同数学国际课程的对比及备考建议
在这篇文章中我们会注重分享AP Precal与 不同数学国际课程体系中相似科目的对比 以及备考建议 欢迎分享与收藏 AP Precal的内容和其他不同体系的对比 （1）和AP Calculus（AP 微积分）对比 AP预备微积分是AP微积分...
AQA A Level Chemistry复习笔记1.1.3 Time of Flight Mass Spectrometry
Time of Flight Mass Spectrometry Mass Spectrometry is a powerful analytical technique It is the most useful instrument for accurate determination of the relative atomic mass of an element, b...
AQA A Level Chemistry复习笔记1.1.2 Mass Number & Isotopes
Subatomic Structure of Atoms & Ions The mass of an atom is concentrated in the nucleus, because the nucleus contains the heaviest subatomic particles (the neutrons and protons) The mass ...
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