It's important to understand that the Big Bang didn't create atoms directly. Here's a breakdown:

* The Big Bang: This was a singularity, an incredibly dense and hot point that rapidly expanded. It was not filled with atoms, but rather with a soup of fundamental particles like quarks and leptons.

* Formation of Atoms: It took roughly 380,000 years for the universe to cool enough for these particles to combine into atoms. The first atoms to form were mostly hydrogen and helium, the simplest elements.

* Molecules: Molecules are formed by the bonding of two or more atoms. These didn't form immediately after the Big Bang. It took millions of years for stars to form, and within these stars, heavier elements were created through nuclear fusion. These heavier elements eventually became the building blocks for molecules.

So, to answer your question directly: The Big Bang did not create molecules directly. Molecules formed later as the universe cooled and stars formed.