A: Chemical history is a systematic historical description of natural chemical knowledge in long-term social practice. Therefore, the history of chemistry is not a pure natural science, but a special historical science where natural science and historical science cross each other.

2. What are the three historical stages in the history of chemistry?

A: It is generally divided into three periods: ancient, modern and modern.

(1) chemical germination to1the middle of the 7th century is the ancient chemical period;

(2) From the second half of17th century, Boyle established chemistry as a science, and the modernization period was in the mid-1990s.

(3) The late 1990s to the 20th century was a period of modern chemistry.