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Islam Usman

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155. Armimah Alwi 24
156. Png Si Hui 24
157. Islam Usman 24
158. Katherine Gerot 22
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last 3 solved tasks
MATH PUZZLE: Can you replace the question mark with a number?
MATH PUZZLE: Can you replace the question mark with a number?
MATH PUZZLE: Can you replace the question mark with a number?

Roald Hoffmann

Born 18 Jul 1937. Polish-born American chemist, corecipient, with Fukui Kenichi of Japan, of the Nobel Prize for Chemistry in 1981 for their independent investigations of the mechanisms of chemical reactions. His work aims at theoretically anticipating the course of chemical reactions. It is based on quantum mechanics (the theory whose starting point is that the smallest building blocks of matter may be regarded both as particles and as waves), which attempts to explain how atoms behave. Orbital interaction and symmetry relations between molecules or parts of molecules are fundamental to this theory of conservation of orbital symmetry in chemical reactions.

Writing letters to son

The following is supposedly a true story. To be included, besides being true, the story is most likely strange, weird, surprising, or funny.

One student fell into a cycle of classes, studying, working and sleeping.

Didn't realize how long he had neglected writing home until he received the following note:

"Dear Son, Your mother and I enjoyed your last letter. Of course, we were much younger then, and more impressionable. Love, Dad."

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