Brain Teasers User Profile


See full ranking list
short ranking list
784. Christina Beck 0
785. deepak gill 0
787. salvatore ventura 0
788. Tamara Bonn 0
last 3 solved tasks

First use of chemical symbols in British textbook.

In 1832, Edward Turner wrote a Preface to the 4th edition of his textbook, Elements of Chemistry (published 1833), in which he explained his use of symbols to represent reactants and products in a chemical reaction of Cyanogen, because he found they solved the difficulty of giving a “clear and concise description of. the phenomena in ordinary language.” His was the first use of chemical symbols in a British chemistry textbook. Turner used some algebra-type notation as suggested by William Whewell with parts of Jöns Jacob Berzelius's system, in which iron was represented by Fe (from Ferrum) and oxygen by O. Thus Fe + O represented one oxide of iron, and 2Fe + 3O represented another. Dots over the symbol indicated degree of oxidation, and an underline stood for two equivalents of a substance.«

Try Nursing!

A very well-built young lady was lying on her psychiatrist's couch, telling him how frustrated she was.

"I tried to be an actress and failed," she complained. "I tried to be a secretary and failed, I tried being a writer and failed, then I tried being a sales clerk, and I failed at that too."

The shrink thought for a moment and said, "Everyone needs to live a full, satisfying life. Why don't you try nursing?"

The girl thinks about this, then bares one of her large, beautiful breasts, points it at the shrink, and says, "Well, I'll give it a try!"

Submitted by Calamjo

Edited by Curtis

Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.