E = mc2. The rest is left as an exercise for the reader.
Okay,they didn't form directly. A quark-gluon plasma formed, and after that had cooled sufficiently to permit hadron formation (really, to force hadron formation), then protons and neutrons formed (electrons came along in there somewhere too, though they're not hadrons). This actually only took a few minutes, though it took much longer (thousands of years) for the universe to cool sufficiently to allow for the formation of stable atoms. The protons and electrons hooked up, and there you are, hydrogen.
How helium formed is more complicated, but it's the same basic process. There wasn't much helium in the early universe, though, and even less lithium and essentially nothing heavier than lithium.
Around 24% of the ordinary matter in the universe is thought to be helium. The Big Bang theory supports this by explaining how helium was formed in the early universe through nuclear fusion reactions when temperatures were high enough to convert hydrogen into helium.
The Big Bang Theory - Family Guy - was created on 2011-05-08.
the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.
The proportions at which elements occur in the observable universe closely match predictions of the Big Bang theory. According to this model, only the simplest elements would have condensed from the primordial quark-gluon plasma: hydrogen and helium. Heaver elements would have formed inside the first stars and supernovae. Most of the visible matter in the universe would therefore be hydrogen and helium, with heavier elements in lesser numbers, proportional to their atomic weight.
It is what created the universe
Penny - The Big Bang Theory - was created in 2007.
Bang Goes the Theory was created on 2009-07-27.
Big Bang Theory - Styx album - was created in 2004.
Around 24% of the ordinary matter in the universe is thought to be helium. The Big Bang theory supports this by explaining how helium was formed in the early universe through nuclear fusion reactions when temperatures were high enough to convert hydrogen into helium.
Before the Big Bang theory, many scientists believed that the universe was static, or infinitely unchanging.
The Big Bang Theory - Family Guy - was created on 2011-05-08.
the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.
The 'big bang' theory.
the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.
the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.
Big Bang Theory - Harem Scarem album - was created on 1998-07-05.
The proportions at which elements occur in the observable universe closely match predictions of the Big Bang theory. According to this model, only the simplest elements would have condensed from the primordial quark-gluon plasma: hydrogen and helium. Heaver elements would have formed inside the first stars and supernovae. Most of the visible matter in the universe would therefore be hydrogen and helium, with heavier elements in lesser numbers, proportional to their atomic weight.