A) What is the wavelength of light emitted by the hydrogen ion (H+) when it captures an electron in its 1s shell?

b) For Helium, what would be the wavelength of the photon emitted from a n= 4 to a n= 2
transition (assuming a Zeff value of 1.34)?

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but

i think tornado but not 100%

the answer is b   just took the test