Write short answers of the following in 2-3 lines of each on your answer sheet.
(2*12) How did the results of the alpha particle scattering experiment contradict Thomson's model of the atom?
ii. Why the impact parameter is considered an important parameter in understanding the dynamics of alpha particle scattering?
Lii. Why the spectrum of hydrogen consists of many lines even if it has only a single electron? Compare the ionization energy in positronium with that in hydrogen.
Determine the minimum angle of the angular momentum vector may make with \( z \)-axis in the case of \( l=3 \).
Differentiate the symmetric and anti-symmetric wave function.
Why is it natural that three quantum numbers are needed to describe an atomic electron (apart from electron spin)?
The magnesium atom has two 3s electrons outside filled inner shells. Find the term symbol of its ground state.
¡x. Why does normal Zeeman Effect occur only in atoms with an even number of electrons?
Give spectral notation of the possible states of an atom, which has closed core plus one d-electron? What is the ground state of the carbon atom?
Describe the Hund's rule for configuration. Supplement your result with an example.