Edexcel A Level Chemistry:复习笔记1.1.4 Mass Spectrometry
Interpreting Mass Spectra Isotopes are different atoms of the same element that contain the same number of protons and electrons but a different number of neutrons These are atoms of the sam...
Edexcel A Level Chemistry:复习笔记1.1.3 Relative Mass
Isotopic & Atomic Mass The relative mass of an atom uses the carbon-12 isotope as the international standard One atom of carbon-12 has an accepted mass of 1.992646538 x 10-26 kg It is not reali...
Edexcel A Level Chemistry:复习笔记1.1.2 Isotopes
Atomic Structure Calculations An atom is neutral and has no overall charge Ions on the other hand are formed when atoms either gain or lose electrons, causing them to become charged The numb...
Edexcel A Level Chemistry:复习笔记1.1.1 Structure of the Atom
Structure of the Atom All matter is composed of atoms, which are the smallest parts of an element that can take place in chemical reactions Atoms are mostly made up of empty space around a v...
CIE A Level Maths: Pure 3复习笔记8.3.3 Square Roots of a Complex Number - Advanced
Square Roots of a Complex Number - Advanced Previously we looked at how to find the square roots of a complex number in Cartesian form (a+bi). We can also find square roots using polar and ...
CIE A Level Maths: Pure 3复习笔记8.3.2 Geometry of Complex Multiplication & Division
Geometry of Complex Multiplication & Division You now know how conjugation, addition and subtraction affect the geometry of complex numbers on an Argand diagram. Now we can look at the e...
CIE A Level Maths: Pure 3复习笔记8.3.1 Exponential Form of Complex Numbers
Exponential Form of Complex Numbers You now know how to do lots of operations with complex numbers: add, subtract, multiply, divide, raise to a power and even square root. The last operation...
CIE A Level Maths: Pure 3复习笔记8.2.5 Inequalities & Regions in Argand Diagrams
Inequalities & Regions in Argand Diagrams How do I sketch inequalities such as or on an Argand diagram? The inequality is satisfied by all complex numbers,, with a real part less than 2 ...
CIE A Level Maths: Pure 3复习笔记8.2.4 Loci in Argand Diagrams
Loci in Argand Diagrams How do I sketch the locus of or on an Argand diagram? All complex numbers,, that satisfy the equation lie on a vertical line with Cartesian equation Any complex number along...
