The energy e of the electron in a hydrogen atom can be calculated from the bohr formula:

e= -ry/n^2

in this equation ry stands for the rydberg energy, and n stands for the principal quantum number of the orbital that holds the electron.

calculate the wavelength of the line in the absorption line spectrum of hydrogen caused by the transition of the electron from an orbital with n=2 to an orbital with n=3.

The wavelength of the line in the absorption line spectrum of hydrogen caused by transition is 657.1 nm.

Explanation:

Energy of the electron in a hydrogen atom in nth shell:

Energy of an electron in n = 2:

Energy of an electron in n = 3:

Energy difference in between both the shells:

:

=

The wavelength of the line in the absorption line spectrum of hydrogen caused by transition is 657.1 nm.

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).