3) (8 Mark)
Imagine an alternate universe in which the magnetic quantum number could only have values of 0 to l
(i. e. 0 ≤ $m_l$ ≤ l). Assuming all the other quantum numbers can take only the values possible in our
universe and that the Pauli exclusion principle applies:
a) Draw out the first five periods of the periodic table of elements in this alternate universe (use the
element symbols as they are in our universe).
b) With different colours, highlight the elements which would be the equivalent of the noble gases,
halogens and alkali metals in this alternate universe.
c) Write the full electron configuration (spdf notation) of chlorine (Z=17) as it would be in this
alternate universe.