Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.4.2 Bromine & Alkenes Bromine & Alkenes Alkenes are a homologous series of hydrocarbon compounds with at least one?double bond?between two of the c...
Properties of Electromagnetic Waves Visible light is just one part of a much bigger spectrum: The Electromagnetic Spectrum All electromagnetic waves have the following properties in common: They ar...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.4.1 Alkenes The Alkenes All alkenes contain a?double carbon bond, which is shown as two lines between two of the carbon atoms i.e. C=C All alkenes contain ...
Doppler Shift of Sound The whistle of a train or the siren of an ambulance appears to decrease in frequency (sounds lower in pitch) as it moves further away from you This frequency change due to th...
Properties of Transverse & Longitudinal Waves In mechanical waves, particles oscillate about fixed points The direction of oscillations with regards to the direction of wave travel determine wh...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.3.2 Halogens & Alkanes Halogens & Alkanes In a substitution reaction, one atom is swapped with another atom Alkanes undergo a substitution reaction...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.3.1 Alkanes The Alkanes Alkanes are a group of?saturated?hydrocarbons The term saturated means that they only have single carbon-carbon bonds, there are no...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.2.4 Cracking Cracking Saturated molecules contain?single?bonds only whereas unsaturated molecules contain?double?bonds between their carbon atoms Alkanes?a...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.2.3 Nitrogen Oxides & Sulfur Dioxide Formation of Nitrogen Oxides Nitrogen Oxides These compounds (NO and NO2) are formed when nitrogen and oxygen reac...
