Calculate the wave number for the shortest wavelength transition in the Balmer series of atomic hydrogen.

Calculate the wavelength for the higest transition in the Balmer series of atomic hydrogen.

Calculate the wavenumber for radiation of longest wavelength in Balmer series of atomic hydrogen.

Calculate the wave number of the microwaves with wavelength 4 (10*7)

What is the shortest wavelength line in the Paschen series of Li^(2+) ion?

What is the shortest wavelength present in the Paschen series of spectral lines?

Calculate the number of atoms in 46g of He.

Calculate the total number of atoms in 18g of water.

State Bohr's quantisation condition of angular momentum. Calculate the shortest wavelength of the Bracket series and state to which part of the electromagnetic spectrum does it belong.

Calculate the number of atoms in 34 mole of Cl.

Calculate the number of atoms in 34 mole of Cl.