Dalton's atomic theory posits that atoms cannot be created or destroyed, raising questions about the origin of the first atom in the universe. Matter can be created from pure radiation, as long as conservation laws are satisfied, a concept explored in Weinberg's "First Three Minutes," which discusses nucleosynthesis during the Big Bang. The first atoms, primarily Hydrogen and Helium, formed hundreds of thousands of years post-Big Bang when the universe cooled enough for electrons to bind with protons. Subsequent nuclear fusion in the first stars led to the creation of heavier elements. Understanding the context and limitations of atomic theories is essential for grasping the processes involved in atomic formation.