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Updated: August 7, 2026
"Why, madam," he exclaimed, in modulated desperation, "the ultimate molecules of a mixture are only placed beside each other, so that an atom of gunpowder may be saltpetre, charcoal, or sulphur, dependent on its fellow-atoms for power to act; whereas a chemical compound is such a perfect union of substances, that each ultimate molecule is complete in its definite proportions of the four elements, and therefore an independent little atom."
But again, how chances it that different atoms attract one another in such varying degrees, so that, for example, fluorine unites with everything it touches, argon with nothing? And how is it that different kinds of atoms can hold to themselves such varying numbers of fellow-atoms oxygen one, hydrogen two, and so on? These are questions for the future.
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