GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Lithium and Carbon
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Hydrogen and Neon
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Helium and Chlorine
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Hydrogen and Helium
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Detailed explanation-1: -But more than 13 billion years ago, following the big bang, the early universe was hot, and all that existed were a few types of atoms, mostly helium and hydrogen. As atoms combined to form the first molecules, the universe was finally able to cool and began to take shape.
Detailed explanation-2: -The first elements-hydrogen and helium-couldn’t form until the universe had cooled enough to allow their nuclei to capture electrons (right), about 380, 000 years after the Big Bang.
Detailed explanation-3: -In the beginning, or at least following the Big Bang more than 14 billion years ago, there was hydrogen, some helium and a little bit of lithium. A grand total of three elements. Today, there are nearly 100 known naturally occurring elements, with hundreds of variants.