According to the rydberg equation, the longest wavelength (in nm) in the series of h- atom lines with a) 1875 nm b) 1458 n ans: a c) 820 nm d) 656 nm e) 365 nm

A) 1875 nm

Explanation:

Hello,

In this case, the Rydberg equation is shown below:

For the series of H- atom, one assigns: as this is the Paschen series with emission down to the level. Now, we must consider that the longest wavelength is from the nearest upper level to the level, that is, the level. In such a way, the resulting wavelength is computed as shown below:

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atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8