Assume that there were four possible values

(–1, ,+ , +1 ) for the spin quantum number ms. Principal quantum number n is defined as usual. However, quantum number λ & m1 are defined as follows:

l : 1 to (n +1) in integral steps

m1: – l /2 to + l /2 (including zero, if any) in integral steps.

The orbitals corresponding to l = 1,2,3 .......designated as A, B, C........respectively. Further, the values of m1 for a given value of l give the number of sub-orbitals in an orbital. The principles for filling electrons in the shells remain unchanged. The order of energies of various orbitals is : A < B < C.......for the same shell.

(i)The number of elements that would be present in the second period of the periodic table is–