Exercise 8.9
What problems could arise if every scientist used different symbols for the same element?
Not cross-checked
NCERT prints no numerical answer for this exercise, so this working has not been cross-checked against the book.
The core problem: scientists would no longer understand one another.
The same element would be written differently in different countries and languages, so a formula or equation written in one place could not be read in another — the very language barrier that symbols were invented to cross.
Worse, one symbol could stand for two different elements, so a written formula would be genuinely ambiguous rather than merely unfamiliar.
Results could not be checked, compared or repeated by other laboratories, which is how science is supposed to work.
Textbooks, data tables and research papers would all need translating before use, wasting effort and introducing errors.
In medicine, industry and the laboratory a mistaken element is not a small error — it can be dangerous.
This is exactly why names and symbols are internationally agreed and approved by IUPAC, so that one symbol means one element everywhere.
