Why do second period elements show anomalous properties?
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Small size of these atoms
High electronegativity
Large charge/radius ratio
These elements also have only 4 valence orbitals available (2s and 2p) for bonding as compared to the 9 available (3s, 3p, and 3d) to the other members of the respective groups, so their maximum covalency is 4. (This is why Boron can only form [BF4]–whereas Aluminium can form [AlF6]3-).
These are the reasons for anomalous periodic properties of second-period elements
High electronegativity
Large charge/radius ratio
These elements also have only 4 valence orbitals available (2s and 2p) for bonding as compared to the 9 available (3s, 3p, and 3d) to the other members of the respective groups, so their maximum covalency is 4. (This is why Boron can only form [BF4]–whereas Aluminium can form [AlF6]3-).
These are the reasons for anomalous periodic properties of second-period elements
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Explanation:
Reasons for Anomalous Periodic Properties
High electronegativity. Large charge/radius ratio. These elements also have only 4 valence orbitals available (2s and 2p) for bonding as compared to the 9 available (3s, 3p, and 3d) to the other members of the respective groups, so their maximum covalency is 4
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