Final answer:
According to valence bond theory, the orbitals that overlap in the formation of the bond in HBra are 2s on H and 4p on Br.
Step-by-step explanation:
According to valence bond theory, the orbitals that overlap in the formation of the bond in HBra are:
a. 2s on H and 4p on Br.
b. 1s on H and 4p on Br.
c. 1s on H and 5p on Br.
d. 1s on H and 3p on Br.
The correct answer is a. 2s on H and 4p on Br. In HBra, the bond between hydrogen (H) and bromine (Br) is formed through the overlapping of the 2s orbital on hydrogen and the 4p orbital on bromine.