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IB DP Chemistry: SL复习笔记4.3.5 Trends in Melting Points of Metals
Trends in Melting Points of Metals The strength of electrostatic attraction can be increased by: Increasing the number of delocalised electrons per metal atom Increasing the positive charges on the...
IB DP Chemistry: SL复习笔记4.3.4 Metallic Bonding
Metallic Bonding Metal atoms are tightly packed together in lattice structures When the metal atoms are in lattice structures, the electrons in their outer shells are free to move throughout the st...
IB DP Chemistry: SL复习笔记4.3.3 Properties of Covalent Compounds
Properties of Covalent Compounds The physical properties of molecular covalent compounds are largely influenced by their intermolecular forces If you know the type of intermolecular forces present ...
IB DP Chemistry: SL复习笔记4.3.2 Deducing Intermolecular Forces
Deducing Intermolecular Forces In order to deduce the types of intermolecular forces present in molecules you need information about the structure and chemical formula of the molecules The chemical...
IB DP Chemistry: SL复习笔记4.3.1 Types of Intermolecular Forces
Intermolecular Forces There are no covalent bonds between molecules in molecular covalent compounds. There are, however, forces of attraction between these molecules, and it is these which must be ...
IB DP Chemistry: SL复习笔记4.2.5 Giant Covalent Structures
Giant Covalent Structures Covalent lattices Covalent bonds are bonds between nonmetals in which electrons are shared between the atoms In some cases, it is not possible to satisfy the bonding capac...
IB DP Chemistry: SL复习笔记4.2.4 Molecular Polarity
Molecular Polarity Assigning polarity to molecules There is a difference between bond polarity and molecular polarity To determine whether a molecule is polar, the following things have to be take...
IB DP Chemistry: SL复习笔记4.2.3 Predicting Molecular Shapes
Predicting Shapes & Bond Angles Before you predict the shape of any molecule work out the Lewis structure to determine the number of bonding and lone pairs Apply the VSEPR rules and you should ...
IB DP Chemistry: SL复习笔记4.2.2 Shapes of Molecules
Shapes of Molecules When an atom forms a covalent bond with another atom, the electrons in the different bonds and the non-bonding electrons in the outer shell all behave as negatively charged clou...
IB DP Chemistry: SL复习笔记4.2.1 Resonance Structures
Resonance Structures The delocalization of electrons can explain the structures of some species that don’t seem to fit with a Lewis structure Delocalized electrons are electrons in a molecule, ion ...
IB DP Chemistry: SL复习笔记4.1.6 Lewis Structures
Lewis Structures Lewis structures are simplified electron shell diagrams and show pairs of electrons around atoms. A pair of electrons can be represented by dots, crosses, a combination of dots and...
