1. BORON FAMILY

2. Introduction
Valence electron configuration, ns2 np1 – so to complete octet, the chemistry of boron involves one of the following means (you can suggest):
+3 oxidation state is expected to be most stable, yes or no ?
The ionization enthalpies are so high that the lattice energies or hydration enthalpies cannot offset the energy,
Note: boron is a nonmetal element

3. 2. –5 oxidation state, yes or no ?
Introduction
3. Form three covalent by sp2 hybrid orbitals, which are not octet. These compounds such as BX3 act as strong Lewis acids.
Comparing the electronegativities of carbon and boron: 2.5 and 2.0, you can understand that there are no borides similar as carbides formed with the most electropositive metals.
2. –5 oxidation state, yes or no ?

4. Note: the special chemical bonding in some compounds of boron.
Introduction
Boron can form many stable compounds, of which there are the problem of electronic deficiency, according to the conventional 2c–2e bonds.
Note: the special chemical bonding in some compounds of boron.