What is the secondmost abundant element in the universe?

Answer 1

Helium

The most abundant element is hydrogen, making up about #90#%, then helium at about #10#%. All other elements put together are less than #1#%.
The most abundant isotope of helium is #""^4 He#, with a mass about #4# times that of the most common isotope #""^1 H# of hydrogen. In terms of mass, helium makes up about #24#% of the mass of the universe.
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Answer 2

Helium is the second most common element in the universe.

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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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