Calculate the wavelength, in nanometers, of the light emitted by a hydrogen atom when its electron falls from the n = 7 to the n = 4 principal energy level. recall that the energy levels of the h atom are given by en = –2.18 × 10–18 j(1/n2)

The wavelength of the light emitted by a hydrogen atom for the given transition is 2166 nm.

Explanation:

The energy of nth energy levels of the H atom is given as:

Energy of the seventh energy level =

Energy of the seventh energy level =

Energy of the light emitted will be equal to the energy difference of the both levels.

Wavelength corresponding to energy E can be calculated by using Planck's equation:

The wavelength of the light emitted by a hydrogen atom for the given transition is 2166 nm.

idk

explanation:

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.