When were the first atoms formed?

Answer 1

Atoms were not formed until long after the Big Bang.

It is believed that it took more than 300,000 years for the first atoms to form when protons and electrons had low enough energies to combine to form hydrogen. We are unsure of what happened before or soon after the Big Bang because the physics is not fully understood. The universe was extremely hot shortly after the Big Bang.

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Answer 2

It was during the recombination period, some 380,000 years after the Big Bang, that the first atoms were formed.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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