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Agus Khoir

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Gilbert Newton Lewis

Died 23 Mar 1946 at age 70 (born 23 Oct 1875). American chemist who collaborated with Irving Langmuir in developing an atomic theory. He developed a theory of valency, which introduced the covalent bond (c. 1916), whereby a chemical combination is made between two atoms by the sharing of a pair of electrons, one contributed from each atom. This was part of his more general octet theory, published in Valence and the Structure of Atoms and Molecules (1923). Lewis visualized the electrons in an atom as being arranged in concentric cubes. The sharing of these electrons he illustrated in the Lewis dot diagrams familiar to chemistry students. He generalized the concept of acids and bases now known as Lewis acids and Lewis bases.«

Faith

Two nuns were driving down a country road when they ran out of gas. They walked to a farmhouse and a farmer gave them some gasoline; but the only container he had was an old bedpan. The nuns were happy to take whatever they were offered and returned to their car. As they were pouring the gasoline from the bedpan into the tank of their car, a minister drove by. He stopped, rolled down his window and said, "Excuse me, sisters. I'm not of your religion, but I couldn't help admiring your faith....!"
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