A Quote by Frederick Soddy
[This] may prove to be the beginning of some embracing generalization, which will throw light, not only on radioactive processes, but on elements in general and the Periodic Law.... Chemical homogeneity is no longer a guarantee that any supposed element is not a mixture of several of different atomic weights, or that any atomic weight is not merely a mean number.
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Probably our atomic weights merely represent a mean value around which the actual atomic weights of the atoms vary within certain narrow limits... when we say, the atomic weight of, for instance, calcium is 40, we really express the fact that, while the majority of calcium atoms have an actual atomic weight of 40, there are not but a few which are represented by 39 or 41, a less number by 38 or 42, and so on.
When the elements are arranged in vertical columns according to increasing atomic weight, so that the horizontal lines contain analogous elements again according to increasing atomic weight, an arrangement results from which several general conclusions may be drawn.
Experimental work of great refinement is necessary in order to determine atomic weights. No relationships between them have yet been certainly found which make it possible for us to compute by any sort of calculation exactly the value of any one atomic weight from any other.
If all the elements are arranged in the order of their atomic weights, a periodic repetition of properties is obtained. This is expressed by the law of periodicity.
It has long been known that the chemical atomic weight of hydrogen was greater than one-quarter of that of helium, but so long as fractional weights were general there was no particular need to explain this fact, nor could any definite conclusions be drawn from it.
Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os) or which increase regularly (eg. K, Ru, Cs).
The question whether atoms exist or not... belongs rather to metaphysics. In chemistry we have only to decide whether the assumption of atoms is an hypothesis adapted to the explanation of chemical phenomena... whether a further development of the atomic hypothesis promises to advance our knowledge of the mechanism of chemical phenomena... I rather expect that we shall some day find, for what we now call atoms, a mathematico-mechanical explanation, which will render an account of atomic weight, of atomicity, and of numerous other properties of the so-called atoms.
If our inconceivably ancient universe even had any beginning, the conditions determining that beginning must even now be engraved in the atomic weights.
Thus at the beginning of 1906 it seemed to be established that the emitters of the spectral series of chemical elements are their positive atomic ions.
The elements which are the most widely diffused have small atomic weights.
Certain characteristic properties of elements can be foretold from their atomic weights.
I want to make meditation an absolute for all students, whatever the subject they may be studying, so their awareness becomes more and more clean and clear. And out of that clarity we can create a beautiful world. Those scientists, if they are also meditators, will not create atomic bombs to destroy. They may use atomic energy to move trains so they don't pollute the air. They may use that atomic energy in the factories so they don't pollute air. Rather than killing man, the same atomic energy can be a tremendous help to save man and his future.
Men and women of the world, never again plan war! With this atomic bomb, war can only mean suicide for the human race. From this atomic waste the people of Nagasaki confront the world and cry out: No more war! Let us follow the commandment of love and work together. The people of Nagasaki prostrate themselves before God and pray: Grant that Nagasaki may be the last atomic wilderness in the history of the world.
The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.
You can never do merely one thing. The law applies to any action that changes something in a complex system. The point is that an action taken to alleviate a problem will trigger several effects, some of which may offset or even negate the one intended.
We must expect the discovery of many as yet unknown elements-for example, elements analogous to aluminum and silicon- whose atomic weight would be between 65 and 75.
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