Question

if g.p. r=1/3 , S4=150 then find a
A.405/4
B. 454/4
C. 504/4
D. 540/4​

Answer 1

Step-by-step explanation:

The energy levels of one-electron ions are given by the equation:

En=(-2.18*10^(-18)J)(Z^2/n^2)

The series in the He spectrum that corresponds to the set of transitions where the electron falls from a higher level to the nf = 4 state is called the Pickering series, an important series in solar astronomy. Calculate the Pickering series wavelength associated with the excited state ni = 9.

What region of the electromagnetic spectrum does this transition fall in?

radio

microwave

gamma

infrared

UV

visible

X ray

So calculate E for n = 9 (and Z is 2). Call that E1

Then calculate E for n = 4 (and Z is 2). Call that E2.

Subtract the two (disregard the sign), then delta E = hc/wavelength. All of that gives you one line. That's the n = 0 to n = 4 transition.

You will have other lines; for example:

n = 8 to n = 4

n = 7 to n = 4

n = 6 to n = 4

n = 5 to n = 4

Im suppose to solve for lambda. How do I do that?