why elements of preiod 2 behave abnormal
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The reasons for differences in periodic properties and hence in chemical behavior are:
Small size of these atomsHigh electronegativityLarge charge/radius ratioThese 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, but there are several other normal trends in the periodic table as well.
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The reasons for differences in periodic properties and hence in chemical behavior are:
Small size of these atomsHigh electronegativityLarge charge/radius ratioThese 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, but there are several other normal trends in the periodic table as well.
Hope it helps u friend... please mark it as brainlest answer
Gargihazra:
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