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

For the same reason we have the same set of numbers.

It is hard enough learning chemistry without having to learn a foreign language at the same time.

Having only one set of chemical symbols is crucial for global communication and understanding in the field of chemistry. Here's why:

1. Consistency: A single set of chemical symbols ensures uniformity and consistency across scientific literature, textbooks, research articles, and communication among scientists around the world. It enables chemists to accurately and efficiently convey information about elements, compounds, and chemical reactions.

2. Clarity and Precision: Chemical symbols, such as H for hydrogen or Na for sodium, serve as a concise representation of elements. With a universally understood set of symbols, scientists can easily recognize and identify elements, which is essential for accurate data interpretation, research collaboration, and effective sharing of knowledge.

3. Language Barriers: Chemistry is an international discipline, and scientists from various countries and cultures contribute to its advancements. A single set of symbols transcends language barriers, allowing scientists from different regions and linguistic backgrounds to communicate seamlessly and collaborate effectively without confusion or misinterpretation.

4. Avoiding Errors: If different regions or countries were to use their own unique sets of chemical symbols, it would lead to confusion, potential misunderstandings, and errors in scientific communication. For example, an element referred to as "C" in one region should be recognized as carbon universally, regardless of the language spoken or cultural background of the scientists involved.

To ensure that there is only one set of chemical symbols used worldwide, there are established international governing bodies like the International Union of Pure and Applied Chemistry (IUPAC). The IUPAC maintains and updates a standardized set of symbols, known as the IUPAC nomenclature, which is widely accepted and followed by the global scientific community. This ensures uniformity and consistency in chemical symbol usage across the world.