Electrons
_Dimensions._—All physical magnitudes are measured in terms of the three fundamental quantities, Length, Mass, Time. When we wish to particularise, we denote these fundamental magnitudes by the letters _L_, _M_, and _T_ respectively. Any magnitude which is not simply a length...
_Dimensions._—All physical magnitudes are measured in terms of the three fundamental quantities, Length, Mass, Time. When we wish to particularise, we denote these fundamental m...
2. Chapter IIThe theory that any piece of matter may be divided up into small particles which are themselves indivisible was a speculation familiar to the ancient Greeks. It is a theory whic...
3. Chapter IIIThe notion that matter consists of discrete particles is, as we have seen, a very satisfactory hypothesis. As opposed to the only other possible theory, that matter is continuou...
4. Chapter IVWe have already said that the various chemical elements are not entirely unrelated to one another. The different chemical elements fall naturally into groups, the members of eac...
5. Chapter VWe have seen that the theory we have been describing, called the nuclear theory of the atom, gives a very satisfactory account of a large number of phenomena. The observed scatt...
6. Chapter VIAny theory of the atom which is to secure our assent must, in broad lines if not in detail, account for the remarkable periodicity in the properties of the chemical elements. We...
7. Chapter VIIIn speaking of _X_-rays we have referred to their wave-lengths and to their spectra, but we have not yet given any indication as to how these wave-lengths are measured. The most...