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Chemistry • A particular element or an atom of an element is depicted by a chemical symbol. • The method by which an atom or radical combine with other chemical species easily is represented by its valency. • A group of atoms which behaves like a single unit and shows valency is known as radical. • The process of transformation of one set of • chemical substances to another is called a chemical reaction. • A chemical equation expresses a chemical reaction by representing the reactants, products and their physical states symbolically. • Analytical chemistry uses qualitative and quantitative observation to identify and measure the physical and chemical properties of substances. In a sense, all chemistry is analytical. • Physical chemistry combines chemistry with physics. Physical chemists study how matter and energy interact. Thermodynamics and quantum mechanics are two of the important branches of physical chemistry. • Organic chemistry specifically studies compounds that contain the element carbon. Carbon has many unique properties that allow it to form complex chemical bonds and very large molecules
Extramarks’ Approach Having difficulty while studying class Chemistry? Then, get access to the best study material at Extramarks. Extramarks is one of the leading e-learning websites in India that will help you ace all of your exams. With a ton of practise questions, sample papers, video tutorials, study notes, and many other immensely helpful learning tools, Extramarks will give you all the practice you need to get excellent higher marks. So, visit Extramarks website now and get access to the best study material for ICSE class 8 Science Chemistry. https://www.extramarks.com/study-material/icse-class-8/chemistry