Science 4th period
Ahmed Hassan Zewail Biography
Chemist And Physicist
Ahmad Hassan Zewail,
were a chemist and physicist, born in Damanhur, Egypt, east of Alexandria, in 1946. He studied at Alexandria and Pennsylvania universities, and then moved to California, where he joined the California Institute of Technology in 1976. His research has been in the development of ultra fast lasers and electrons for studies of dynamics in chemistry and biology, and he received the 1999 Nobel Prize for Chemistry for his studies of the transition states of chemical reactions using femtosecond’s spectroscopy.
Femtochemistry is the branch of chemistry in which chemical reactions are detected as they occur and the reaction times are measured. Femtochemistry gets its name from the fact that these times are measured in femtoseconds. One femtosecond is one-millionth of one-billionth of a second. This number is written out as a decimal point followed by 14 zeros and a 1. Scientists believe that no chemical reaction can take place more rapidly than this.What would a soccer match on TV be without "slow motion" revealing afterwards the movements of the players and the ball when a goal is scored? Chemical reactions are a similar case. He was able to follow chemical reactions in the greatest detail has prompted increasingly advanced technology. Ahmed H. Zewail, has studied atoms and molecules in "slow motion" during a reaction and seen what actually happens when chemical bonds break and new ones are created. [pic]
He was the winner of the Nobel Prize for Chemistry because of his find of femtoseconds.