Which of the following hybrid atomic orbitals would you consider most useful for approximating a molecular orbital scheme around the boron atom in bf3?
select one:
a. sp3
b. 2s and 2p
c. sp2
d. sp

Explanation:

Atomic number of boron = 5

In ground state,

Valence shell electronic configuration of B =

In excited state, one 2s electrons goes into vacant 2p orbital and electronic configuration becomes:

Now, 3 orbitals (2s, and two orbitals of 2p) of B have unpaired electrons. These three orbitals (one 2s, and two orbitals of 2p) undergoes hybridisation to form three hybridised sp2 orbitals.

These 3 hybridised sp2 orbitals are oriented in a trigonal planar arrangement.

The  three hybridised sp2 orbitals overlap with 2p orbital of three F to form three B-F bonds.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.