We weren't there; NOBODY was. There was nothing at the moment of the Big Bang, and we cannot be certain of what came into existence or when in the seconds, minutes or hours following the event.
So, "immediately"? We believe - based entirely on poorly-understood mathematical theories for which no practical test is possible - that "matter", in the sense of protons, neutrons, electrons, and their corresponding antiparticles, probably did come into existence within a few seconds of the event.
it was too hot
Immediately after the Big Bang, the universe was extremely hot and dense, consisting mainly of a quark-gluon plasma, where protons and neutrons did not yet exist. As the universe expanded and cooled, quarks combined to form protons and neutrons, but it took several minutes for these nucleons to bond with electrons to form neutral atoms. This process, called recombination, occurred when the temperature dropped sufficiently for electrons to combine with protons and form hydrogen and helium, allowing atoms to exist in a stable form. Prior to that, the intense energy and radiation prevented stable atomic structures from forming.
Three minutes after the Big Bang, the universe had cooled down enough for protons and neutrons to begin combining to form the first atomic nuclei, a process known as nucleosynthesis. This marks the beginning of the era of light nuclei formation in the early universe.
The first types of particles produced by the Big Bang were quarks and leptons. Quarks combined to form protons and neutrons, while leptons included electrons and neutrinos. These fundamental particles emerged during the early moments of the universe as it cooled and expanded. Eventually, protons and neutrons formed atomic nuclei, leading to the creation of hydrogen and helium.
Protons are subatomic particles with a positive electric charge, found in the nucleus of atoms. They are one of the primary constituents of atomic matter, along with neutrons and electrons. Protons were formed during the first moments after the Big Bang through processes involving the cooling and combination of quarks, which are elementary particles. As the universe expanded and cooled, these quarks combined to form protons and neutrons, leading to the creation of atomic nuclei during the process of nucleosynthesis.
it was too hot
Yes, it was during the Hadron Epoch.
They formed early in the big bang before matter and energy decoupled.
Three minutes after the Big Bang, the universe had cooled down enough for protons and neutrons to begin combining to form the first atomic nuclei, a process known as nucleosynthesis. This marks the beginning of the era of light nuclei formation in the early universe.
Hydrogen was formed in the early universe through a process called Big Bang nucleosynthesis, where protons and neutrons combined to form hydrogen nuclei. It is the most abundant element in the universe, created during the first few minutes after the Big Bang.
Quarks and leptons are produced immediately after the big bang.
The currently accepted model of the Big Bang predicts that the early universe was composed of a quark-gluon plasma. After it cooled, baryons could form (baryons are particles like protons and neutrons which are made of quarks), and some time after that atoms could form. If you mean which was DISCOVERED first, atoms, by at least a couple of centuries.
Hydrogen was formed in the early universe, around 3 minutes after the Big Bang during a phase known as Big Bang nucleosynthesis. At that time, the extremely high temperatures and pressures allowed for the fusion of protons and neutrons to form hydrogen nuclei.
That depends by what level of "stick together" you are talking about. For example, quarks and gluons combined to form protons and neutrons, approximately one millionth of a second after the Big Bang. For other levels of "sticking together", check the Wikipedia article on the Big Bang.
Atoms are made up of protons and neutrons, the protons and neutrons are at the central core called the nucleus, and the electrons revolve around it, being held in orbit by the electromagnetic force between the negatively charged electrons and the positively charged protons in the central nucleus. They were formed right after the "Big Bang" when our known universe originated from pure energy some billions of years ago. From these, atoms of different elements were produced.
Within the context of elements, Hydrogen is the most basic building block of our universe. Good old number 1 on the periodic table. It's simple structure tells us that it would've been the first element to form after the big bang. However, we can't say that it formed instantly. In the earliest stages the Universe would've been too dense and too hot for the formation of Hydrogen. If you are looking for a magic number for an assignment or something, you should be safe saying that they formed within 5 seconds.
When Matter and anti-matter collided the Big Bang came into existence. But something still remains a mystery that how did the Matter and anti-matter come.