Chemistry has existed for a very long time. Chemistry dates back to prehistory. If you put the amount of time chemistry takes up into a timeline, you would divide it into four general categories. The four categories are: prehistory - early Christian era (black magic), early Christian era - late 17th century (alchemy), late 17th century - mid-19th century (traditional chemistry), and mid-19th century - present (modern chemistry). It begins at the beginning of the Christian era (black magic). In 1700 BC, when known metals were first recorded and listed. In 430 BC Democritus proclaimed the atom as the simplest form of matter, composed of atoms. In 300 BC Aristotle stated that all matter is composed of fire, air, water and earth. The next era is also at the beginning of the Christian era, but at the end of the 17th century, Alchemy. In 300 BC-300 AD, alchemists attempted to turn cheap metals into gold with the substance called the Philosopher's Stone. In the period between 1200 and 1400, the transmutation of cheap metals into gold never occurred in this time period. In 1520, alchemists wanted to start converting metals into gold and also wanted to find a chemical that would allow for longer life and a cure for all ailments. At the end of the 17th century, early chemistry was on the verge of being destroyed because some disapproved of Aristotle's theory of the four elements. The next era is the end of the 17th century - mid-19th century, also known as "traditional chemistry". ”. In 1700, Johann J. Beecher discovered a substance called phlogiston. When substances burn, phlogiston is supposedly added from the air to ignite the object that is burning. Charles Coulcomb the......middle of paper......Curie and Frederic Joliot-Curie discovered that radioactive elements can be created artificially by the bombardment of alpha particles on certain elements. They received the Nobel Peace Prize in 1935. In the 1940s the Manhattan Project began. Albert Einstein and Enrico Fermi warned the United States about extensive German research into the atomic fission reaction. The United States has developed the first functioning nuclear fission reactor under the University of Chicago football field. The Manhattan Project was officially in the works. Chemistry has evolved a lot over the years. The history of chemistry shapes what it is today. Almost everything you touch, wear, or even eat is somehow related to or influenced by chemistry. In the future, I think chemistry will continue to evolve even more and will eventually become a more diverse field.