Basic elements form

Protons and neutrons come together to form the nuclei of simple elements: hydrogen, helium and lithium. It will take another 300,000 years for electrons to be captured into orbits around these nuclei to form stable atoms.
Further info :
Microwave Anistropy Probe - http://map.gsfc.nasa.gov/index.html
Big Bang Cosmology (NASA) - http://map.gsfc.nasa.gov/m_uni/uni_101bb1.html