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IB DP Chemistry: SL復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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...
