IB DP Chemistry: HL復習筆記14.1.4 Formal Charge
Formal Charge A limitation of the model of covalent bonding is that when drawing Lewis structures for molecules, it is sometimes possible to come up with more than one structure while still obeying...
IB DP Chemistry: HL復習筆記14.1.3 Further VSEPR Theory
Further VSEPR Theory Revisiting Valence Shell Electron Pair Repulsion Theory (VSEPR) When an atom forms a covalent bond with another atom, the electrons in the different bonds and the non-bonding e...
IB DP Chemistry: HL復習筆記14.1.2 More Lewis Structures
Octet Rule Exceptions Incomplete octets We have seen previously that for elements below atomic number 20 the?octet rule?states that the atoms try to achieve 8 electrons in their valence shells, so ...
IB DP Chemistry: HL復習筆記14.1.1 Covalent Bonds
Sigma Bonds 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 single unpaired electron When a cov...
IB DP Chemistry: HL復習筆記13.1.6 Factors Affecting Colour
Factors Affecting Colour The size of the splitting energy ΔE?in the d-orbitals is influenced by the following four factors: The size and type of ligands The nuclear charge and identity of the metal...
IB DP Chemistry: HL復習筆記13.1.5 Colour in Transition Metals
Crystal Field Theory Perception of colour Most transition metal compounds appear coloured. This is because they absorb energy corresponding to certain parts of the visible?electromagnetic spectrum ...
究竟哪一個才是最具權威的世界大學排名？
關于大學排名信息不實早已不是鮮見的新聞，每一次各大世界大學排行榜一發布，總是會引發各路人士激烈的討論。有人樂于分享自己學校的好成績，也有人怒于聲討和質疑排名的準確性。那這五花八門的各大排行榜單中，...
IB DP Chemistry: HL復習筆記13.1.4 Catalytic & Magnetic Properties
Catalytic Properties Transition metals are often used as?catalysts?in the elemental form or as compounds The ability of transition metals to form more than one stable oxidation state means that the...
IB DP Chemistry: HL復習筆記13.1.3 Complex Ions
Complex Ions Transition element ions can form complexes which consist of a?central metal ion?and?ligands A ligand is a molecule or ion that forms a co-ordinate bond with a transition metal by donat...
