Question

why does boron differ from other members of the group

Answer 1

In the 3rd group, Boron is the only metal which resembles both properties of metals and non-metals like a metalloid while remaining metals show only the properties of metals. 

Answer 2

Due to its smaller size and unavailability of d-electrons boron is found to exhibit properties which are in contrast to the other elements of the boron family. These properties are known as anomalous properties of boron.


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