Series

Let v_(1) be the frequency of series limit of Lyman series, v_(2) the frequency of the first line of Lyman series and v_(3) the frequency of series limit of Balmer series. Then which of the following is correct ?

There are four radioactive decay series called thorium (4n) , uranium (4n + 2) actinium (4n + 3) and neptunium (4n + 1) series. Neptunium series is artificial while other three series are natural. The end productsd of each radioacitve decay series have stable nuclei. All natural decay series terminate at lead but neptunium or artificial series terminate at bismuth. ._(86)Rn^(219) is a member of actinium series. Another member of same series is

There are four radioactive decay series called thorium (4n) , uranium (4n + 2) actinium (4n + 3) and neptunium (4n + 1) series. Neptunium series is artificial while other three series are natural. The end productsd of each radioacitve decay series have stable nuclei. All natural decay series terminate at lead but neptunium or artificial series terminate at bismuth. Actinium series begins with an isotope of

There are four radioactive decay series called thorium (4n) , uranium (4n + 2) actinium (4n + 3) and neptunium (4n + 1) series. Neptunium series is artificial while other three series are natural. The end productsd of each radioacitve decay series have stable nuclei. All natural decay series terminate at lead but neptunium or artificial series terminate at bismuth. The end products of uranium and actinium series are, respectively

There are four radioactive decay series called thorium (4n) , uranium (4n + 2) actinium (4n + 3) and neptunium (4n + 1) series. Neptunium series is artificial while other three series are natural. The end productsd of each radioacitve decay series have stable nuclei. All natural decay series terminate at lead but neptunium or artificial series terminate at bismuth. The starting isotope and the end product: isotope of actinium series are

Calculate (a) The wavelength and the frequency of the H_(beta) line of the Balmer series for hydrogen. (b) Find the longest and shortest wavelengths in the Lyman series for hydrogen. In what region of the electromagnetic spectrum does this series lie ? (c) Whenever a photon is emitted by hydrogen in Balmer series, it is followed by another photon in LYman series. What wavelength does this latter photon correspond to ? (d) The wavelength of the first of Lyman series for hydrogen is identical to that of the second line of Balmer series for some hydrogen-like ion X. Find Z and energy for first four levels.

There are four radioactive decay series called thorium (4n) , uranium (4n + 2) actinium (4n + 3) and neptunium (4n + 1) series. Neptunium series is artificial while other three series are natural. The end productsd of each radioacitve decay series have stable nuclei. All natural decay series terminate at lead but neptunium or artificial series terminate at bismuth. The end product formed in the disintegration of ._(88)Ra^(222) is