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ICSE Class 10 Answered

Aluminium has a valency of 3 but it is a metal where is Boron has a valency of 3 and it is a non metal ... Why.pls explain  
Asked by bsap6777 | 22 Sep, 2018, 06:58: PM
answered-by-expert Expert Answer
All the elements in the group show metallic properties except boron, a non-metal. 
The non-metallic character of B is due to
1. Small atomic size
2. High ionization enthalpy 
3. High electronegativity
Answered by Ramandeep | 25 Sep, 2018, 12:48: PM

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