The elements which are the most widely diffused have small atomic weights.
Not all chemicals are bad. Without chemicals such as hydrogen and oxygen, for example, there would be no way to make water, a vital ingredient in beer.
People expect us to be different, but we’re not. We’re very similar people, and it’s because we’re so similar and close to each other that we make each other laugh – in fact we make each other laugh more than we make anyone else laugh.
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 magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a compound body.
The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.
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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