A single photon excites only a single electron

Name three elements that have only a single electron in their outermost shells

A : There is almost no time-lag between the incidence of light and the emission of photoelectrons . R : A photon transfer almost all its energy to a single electron in a metal .

A : There is almost no time-lag between the incidence of light and the emission of photoelectrons . R : A photon transfer almost all its energy to a single electron in a metal .

The velocity of an electron in single electron atom in an orbit

The velocity of an electron in single electron atom in an orbit

The velocity of an electron in single electron atom in an orbit

Ratio of wavelength of series limit of Paschen and Brackett series for a single electronic species is :

Name the following: Two elements having a single electron in their outermost shell.