Monsterboy said:After the big bang ,how long did it take for atoms to be formed? how long did it take for the elementary/fundamental particles to come together and form atoms?did atoms formed instantly after the big bang? first atoms were hydrogen right?
phinds said:about 3 minutes.
EDIT: by the way, you should learn to use Google; it would have pointed you to not only the answer but some discussion.
Monsterboy said:hmm..you are right about the google part...it's given that recombination happened 300,000 years after the big bang http://en.wikipedia.org/wiki/Chronology_of_the_universe
So during photon epoch almost all the leptons annihilated ,so very few nuclei could capture electrons and become electrically neutral atoms ,then right? so the universe is mostly ionic?
Monsterboy said:So during photon epoch almost all the leptons annihilated ,so very few nuclei could capture electrons and become electrically neutral atoms ,then right? so the universe is mostly ionic?
The first atoms formed approximately 380,000 years after the Big Bang. This is known as the "recombination era" when the universe cooled down enough for electrons to combine with protons and form neutral hydrogen atoms.
The first atoms to form were hydrogen and helium. These are the two most abundant elements in the universe and were created during the first few minutes after the Big Bang.
The first atoms were formed through a process called nucleosynthesis. During the first few minutes after the Big Bang, there was a rapid period of expansion and cooling, allowing for the formation of protons, neutrons, and eventually, atoms.
Yes, we can observe the first atoms that formed after the Big Bang through a phenomenon known as the cosmic microwave background (CMB). This is the leftover radiation from the Big Bang and provides valuable information about the early universe.
We know when the first atoms formed after the Big Bang through various scientific methods, such as studying the CMB, analyzing the abundance of elements in the universe, and using computer simulations. These methods allow us to estimate the time frame in which the first atoms were created.