Why boron does not exist as `B^(2+)` ion in solution or in compound ?

Why boron does not exist as B^(3+) ion in solution or in compound ?

Why boron does not form B^(3+) ion?

Does boron form ionic compounds ?

Boron does not form B^(3+) ion. Why?

Boron does not form B^(3+) ion. Why?

Why boron does not form B^(3+) ion ?

Which of the ions does not exist ?

Boron does not form B^(3+) ion, due to.

Explain the following (a) Gallium has higher ionisation enthalpy than aluminium (b) Boron does not exist as B^(3+) ion (c) Aluminium forms [AlF_(6)]^(3-) ion but boron does not form [BF_(6)]^(3-) ion.

He_(2) does not exist why ?