Q.

Elements of group 13 mainly form covalent compounds because

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a

size of ion is small

b

All of these

c

Sum of ionization energies is very high

d

Electro negativity values are high

answer is D.

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Detailed Solution

Due to small size of IIIA group elements, the sum of its first three ionization enthalpies and electronegativity values very high, they form covalent compounds.

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Elements of group 13 mainly form covalent compounds because