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John Callahan

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last 3 solved tasks
What kind of coat can only be put on when wet?
See negative of movie scene and guess the title. Length of words in solution: 6,7,4
3 ducks lay 3 eggs in 3 days. How many eggs will 300 ducks lay in 300 days?

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.«

When you truly don't care

When you truly don't care when anyone thinks of you, you have reached a dangerously awesome level of freedom.
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