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Question
Write a short note on anomalous properties of the first element of the p-block.
Solution
In p-block elements, the first member of each group differs from the other elements of the corresponding group.
The following factors are responsible for this anomalous behaviour.
- Small size of the first member.
- High ionisation enthalpy and high electronegativity.
- Absence of d-orbitals in their valance shell.
The first member of group-13, boron is a metalloid while others are reactive metals. Moreover, boron shows a diagonal relationship with silicon of group -14. The oxides of boron and silicon are similar in their acidic nature.
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