Zhang Zili thought Ye Tian couldn't understand, so he immediately explained, "Mr. Ye, the gold medal you asked me to investigate, after the most precise X-ray detection, is indeed composed of gold elements. There are no other elements present in the composition of the gold medal.
However, generally speaking, items made of pure gold elements are relatively soft. It's not just gold elements; other metals are similar because their molecules are almost spherical, so when these molecules combine, there are some gaps.
The higher hardness of alloys also comes from this principle. Larger spherical molecules can accommodate smaller spherical molecules, thus reducing the distance between molecules, naturally increasing the metal's hardness significantly."
Zhang Zili's explanation was clear and vivid, making it understandable even for those who don't understand physics.
