AQA A Level Maths: Pure復習筆記2.8.1 Language of Functions
Language of Functions Language of functions The language of functions has many keywords associated with it that need to be understood What are mappings? A?mapping?takes an ‘inp...
IB DP Chemistry: HL復習筆記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 ...
AQA A Level Maths: Pure復習筆記2.7.4 Proportional Relationships
Proportional Relationships Proportional relationships Proportional relationships describe a proportional connection between two variables This can happen in two ways Direct proportion one va...
IB DP Chemistry: HL復習筆記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: HL復習筆記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: HL復習筆記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: HL復習筆記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: HL復習筆記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: HL復習筆記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...
IB DP Chemistry: HL復習筆記4.1.5 Bond Polarity
Bond Polarity When two atoms in a covalent bond have the?same electronegativity?the covalent bond is?nonpolar The two chlorine atoms have identical electronegativities so the bonding electrons are ...
IB DP Chemistry: HL復習筆記4.1.4 Covalent Bonds
Covalent Bonds Covalent?bonding occurs between two?non-metals A covalent bond involves the?electrostatic?attraction?between nuclei of two atoms and the electrons of their outer shells No?electrons?...
AQA A Level Maths: Pure復習筆記2.7.3 Solving Equations Graphically
Solving Equations Graphically Solving (simultaneous) equations graphically This is a way to solve?simultaneous?equations?(see Simultaneous Equations) Coordinates of the?intersections?are the...
