AQA A Level Biology复习笔记1.1.3 Monosaccharides
Monosaccharides: Common Examples Sugars can be classified as reducing or non-reducing; this classification is dependent on their ability to donate electrons Reducing sugars can donate electr...
AQA A Level Biology复习笔记1.1.2 Biological Molecules: Reactions
Biological Molecules: Reactions A covalent bond is the sharing of two or more electrons between two atoms The electrons can be shared equally forming a nonpolar covalent bond or unequally (w...
Edexcel IGCSE Maths 复习笔记 1.16.1 Using a Calculator
Edexcel IGCSE Maths 复习笔记 1.16.1 Using a Calculator Why the fuss about using a calculator? GCSE Mathematics goes beyond using the basic features of a calculator and explores many of the special ...
Edexcel IGCSE Maths 复习笔记 1.15.1 Best Buy
Edexcel IGCSE Maths 复习笔记 1.15.1 Best Buy How do you tackle “Best Buy” problems? You may need a range of skills… Decide on a suitable comparison – eg total cost, cost/year, cost/m2 etc) Be consi...
AQA A Level Physics复习笔记2.5.1 Collisions of Electrons with Atoms
Ionisation & Excitation Ionisation of an atom is: The removal, or addition, of an electron from, or to, an atom when given sufficient energy Excitation of electrons is: When an electron ...
AQA A Level Physics复习笔记2.4.1 The Electronvolt
The Electronvolt The electronvolt is a unit which is commonly used to express very small energies This is because quantum energies tend to be much smaller than 1 Joule The electronvolt is de...
AQA A Level Physics复习笔记2.3.1 The Four Fundamental Interactions
The Four Fundamental Interactions There are four fundamental interactions, or fundamental forces, that exist. These are: Gravity Electromagnetism Strong Nuclear (or Strong Interaction) Weak ...
Edexcel IGCSE Maths复习笔记 1.14.1 Exchange Rates
Edexcel IGCSE Maths复习笔记 1.14.1 Exchange Rates Simplifying exchange rate questions Use ratios! Put exchange rates in ratio form (use more than one line if necessary) Add lines for prices/costs U...
AQA A Level Physics复习笔记2.2.1 Hadrons
Baryons & Mesons Hadrons Hadrons are the group of subatomic particles that are made up of quarks Therefore, hadrons can feel the strong nuclear force There are two classes of hadrons: Ba...
