What Happens to the Entropy of Two Atoms When a Covalent

Question

What happens to the entropy of two atoms when a covalent bond forms between them?  
A) The entropy of both atoms decreases.
B) The entropy is unchanged.
C) One atom passes its entropy to the other.
D) The entropy of both atoms increases.
E) Entropy is formed as heat.

Accepted Answer

When a covalent bond forms between two atoms, the system becomes more ordered as the atoms are now linked, reducing the number of possible arrangements and motions for those atoms. This decrease in disorder means the entropy of the system decreases.