Why is it important to have only one set of chemical symbols in the world ?

As you learned, scientists standardized the short-hand way we represent elements, by their chemical symbol. One of the main reasons this was developed was because using letters was the easiest way to represent the elements. Another reason that we use chemical symbols is to allow us to write chemical formulas easily

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One set of chemical symbols means that every science student and scientist -- no matter what languages they speak -- can identify these chemicals.

I hope this helps

answer; i believe that the correct answer is (d) a very small amount of mass

it is very well related to a lot of things but with my limited knowledge i can confidently say that the answer is space.