Which best defines Big Bang nucleosynthesis?
A.The unending expansion of the universe.
B.The birth of elementary particles at the beginning of time.
C.A hot plasma in which energy is distributed evenly throughout.
D.The formation of atomic nuclei through the combination of protons and neutrons.
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Answer:
D
Explanation:
The Big Bang nucleosynthesis is all about the creation of atomic nuclei due to the combination of protons and neutrons shortly after the Big Bang. It produced elements heavier than hydrogen such as helium.