Point particle of point charges cannot be maintained in an equilibrium configuration solely by the electrostatic interaction of the charges. In quantum mechanics, there is a distinction between an elementary particle (also called "point particle") and a composite particle. An elementary particle, such as an electron, quark, or photon, is a particle with no internal structure. Whereas a composite particle, such as a proton or neutron, has an internal structure (see figure). However, neither elementary nor composite particles are spatially localized, because of the Heisenberg uncertainty principle. The particle wavepacket always occupies a nonzero volume. For example, see atomic orbital: The electron
Randall (given name) Randall (given name) Randall is a masculine given name in English and German . Its modern use as a given name originates from the transferred use of the English–language surname "Randall", which in turn is derived from "Randolph". There are several variant spellings of the English given name; these include Randal, Randel, Randell, and Randle. The pet form is "Randy". The form "Randal" has also used as an Anglicisation of an etymologically unrelated Irish and Scottish Gaelic name "Raghnall". This Anglicisation has been noted as being particularly common amongst several Irish families of note. "Randal" has not been among the