The spectrum of a gaseous discharge from an unknown hydrogen-like ion shows a…

CHEMISTRY · Subjective · CBSE · Chemistry · Structure of Atom · Structure of Atom

Problem

The spectrum of a gaseous discharge from an unknown hydrogen-like ion shows a prominent line at

30.4\,\text{nm}

that is known to arise from the transition

n=2 \rightarrow n=1

. (i) Calculate the atomic number

Z

of the ion. (Take the wavelength of the same transition in hydrogen to be

121.6\,\text{nm}

.) (ii) Name the ion (specify both the element and its charge state) that corresponds to this atomic number.