Sodium borohydride, nabh4, and boron trifluoride, bf3, are compounds of boron. what are the shapes around boron in the borohydride ion and in boron trifluoride?

The shape of boron in borohydride ion is tetrahedral and in boron trifluoride is trigonal planar.

Explanation: Formula used

where, V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

1.

The number of electron pairs is 4 that means the hybridization will be and the electronic geometry of the molecule will be tetrahedral.

2.

The number of electron pairs is 3 that means the hybridization will be and the electronic geometry of the molecule will be trigonal planar.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

it should be all of them because it asks if you included all of those in your answer

explanation: