CIE A Level Chemistry复习笔记1.3.11 Shapes of Molecules
VSEPR: Theory & Predictions The valence shell electron pair repulsion theory (VSEPR) predicts the shape and bond angles of molecules Electrons are negatively charged and will repel other electr...
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CIE A Level Chemistry复习笔记1.3.10 Bond Energy & Length
Covalent Bonding: Bond Energy & Length Bond energy The bond energy is the energy required to break one mole of a particular covalent bond in the gaseous states Bond energy has units of kJ mol-1...
CIE A Level Chemistry复习笔记1.3.9 Hybridisation
Covalent Bonding: Orbitals & Hybridisation Bond overlap in covalent bonds A single covalent bond is formed when two nonmetals combine Each atom that combines has an atomic orbital containing a ...
CIE A Level Chemistry复习笔记1.3.8 Coordinate Bonding
Dative Bonding: Definition & Examples In simple covalent bonds the two atoms involved shares electrons Some molecules have a lone pair of electrons that can be donated to form a bond with an el...
CIE A Level Chemistry复习笔记1.3.7 Covalent Bonding
Covalent Bonding: Definition & Examples Covalent bonding occurs between two nonmetals A covalent bond involves the electrostatic attraction between nuclei of two atoms and the bonding electrons...
CIE A Level Chemistry复习笔记1.3.6 Metallic Bonding
Metallic Bonding: Definition 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 throu...
CIE A Level Chemistry复习笔记1.3.5 Ionic Bonding Examples
Ionic Bonding: Examples Sodium chloride Sodium is a Group 1 metal It loses its outer electron to form a sodium ion with a +1 charge (Na+) Chlorine is a Group 7 non-metal It gains 1 electron to form...
CIE A Level Chemistry复习笔记1.3.4 Ionic Bonding
Ionic Bonding: Definition As a general rule, metals are on the left of the Periodic Table and nonmetals are on the right-hand side Ionic bonding involves the transfer of electrons from a metallic e...
CIE A Level Chemistry复习笔记1.3.3 Electronegativity & Bonding
Electronegativity: Predicting Bond Formation The differences in Pauling electronegativity values can be used to predict whether a bond is covalent or ionic in character Electronegativity & cova...
