Question

describe a sigma bond.

s orbital overlapping with the side of a p orbital

side by side overlap of d orbitals

overlap of two d orbitals

p orbital overlapping with an f orbital

end to end overlap of p orbitals

Explanation:

A sigma bond is formed by the end - to - end (head - on) overlap of atomic orbitals. Among the given options, the description of "end to end overlap of p orbitals" is consistent with the formation mechanism of a sigma bond. The other options describe types of overlaps that form pi bonds (side - by - side overlap) or involve orbital combinations that are not typical for sigma bond formation in common bonding scenarios.

Answer:

end to end overlap of p orbitals