Answer: In the Bohr model of the atom, the principal quantum number (n) describes the energy level of the electron, and the azimuthal quantum number (l) describes the angular momentum of the electron. The allowed values of l for a given value of n are integers ranging from 0 to (n-1). Therefore, for the second principal level (n = 2), the possible values of l are:
l = 0, 1
So the allowed values of l for the second principal level are 0 and 1. Note that the value of l also determines the shape of the orbital, with l = 0 corresponding to an s orbital and l = 1 corresponding to a p orbital.
Explanation: In the Bohr model of the atom, the principal quantum number (n) describes the energy level of the electron, and the azimuthal quantum number (l) describes the angular momentum of the electron. The allowed values of l for a given value of n are integers ranging from 0 to (n-1). Therefore, for the second principal level (n = 2), the possible values of l are:
l = 0, 1
So the allowed values of l for the second principal level are 0 and 1. Note that the value of l also determines the shape of the orbital, with l = 0 corresponding to an s orbital and l = 1 corresponding to a p orbital.