What elements are least abundant in the universe?

Answer 1

Well, we would ASSUME the transuranics…..

The most abundant element in the universe is hydrogen... See this site that lists the most abundant elements.

And see this graph from the same site

Technetium metal, whose name literally means #"made by the hand"#, and which has a special application in radiopharmeceuticals, may only be present on Earth in a 20000 tonne mass....

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Answer 2

Owen Ambrose

Because of their formation processes, elements with higher atomic numbers—such as lithium, beryllium, helium, and hydrogen—are generally the least abundant in the universe. Elements with lower atomic numbers, such as uranium and thorium, are also relatively rare.

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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.