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EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：2.3.1 Composition of Air Composition of Air The proportion of gases in the air has not changed much in 200 million years About four fifths o...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：2.2.1 Group 7 (Halogens) Physical Properties The elements in group 7 are known as the halogens These are fluorine, chlorine, bromine, iodine...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：2.1.1 Group 1 (Alkali Metals) How Alkali Metals React with Water The group 1 metals are known as the alkali metals They form alkaline soluti...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.7.4 Giant Covalent Structures Giant Covalent Structures Covalent bonding can be responsible for substances that have many different struct...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.7.3 Simple Molecular Structures Simple Molecular Structures Simple molecular structures have covalent bonds joining the atoms together, bu...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.7.1 Formation of Covalent Bonds Formation of Covalent Bonds Non-metal atoms can share electrons with other non-metal atoms to obtain a ful...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.7.2 Covalent Bonds: Dot & Cross Diagrams Covalent Bonds: Dot & Cross Diagrams Covalent substances tend to have small molecular str...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.6.1 Formation of Ions Formation of Ions An ion is an electrically charged atom or group of atoms formed by the loss or gain of electrons This los...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.5.1 Word & Chemical Equations Writing Equations Nothing created - nothing destroyed New substances are made during chemical reactions ...
