EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.3.2 Halogens & Alkanes Halogens & Alkanes In a substitution reaction, one atom is swapped with another atom Alkanes undergo a subs...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.3.1 Alkanes The Alkanes Alkanes are a group of saturated hydrocarbons The term saturated means that they only have single carbon-carbon bo...
Practical: Investigating the Rate of Diffusion Recording a range of quantitative measurements It is important to use appropriate apparatus when recording a range of quantitative measurements Quanti...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.2.4 Cracking Cracking Saturated molecules contain single bonds only whereas unsaturated molecules contain double bonds between their carbo...
Practical: Data loggers & Computer Modelling Data loggers Dataloggers are a tool that allows for the quick and efficient gathering of data This technology can be used for simple data collection...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.2.3 Nitrogen Oxides & Sulfur Dioxide Formation of Nitrogen Oxides Nitrogen Oxides These compounds (NO and NO2) are formed when nitroge...
Practical: Investigating Biodiversity Using Sampling Use of sampling techniques in fieldwork Sampling is a method of investigating the abundance and distribution of species and populations There ar...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.2.1 Crude Oil & Fractional Distillation Crude Oil & Fractional Distillation Crude oil as a mixture is not a very useful substance ...
Drawing Cells From Blood Smears To record the observations seen under the microscope (or from photomicrographs taken) a labelled biological drawing is often made Biological drawings are line pictur...
