"Chemistry song 07" joke

Quantum Chemistry

On the first day of Christmas, my professor gave to me: An exam in Quantum Chemistry.

On the second day of Christmas, my professor gave to me: a double integral and an exam in Quantum Chemistry.

On the third day of Christmas, my professor gave to me: three orbitals, a double integral, and an exam in Quantum Chemistry.

On the fourth day of Christmas, my professor gave to me: four harmonic oscillators, three orbitals, etc.

On the fifth day of Christmas, my professor gave to me: Five Hermitian Operators! Four harmonic ocillators, three orbitals, etc.

On the sixth day of Christmas, my professor gave to me: six spin-orbit couplings, etc.

On the seventh day of Christmas, my professor gave to me: seven basis functions, etc.

On the eighth day of Christmas, my professor gave to me: eight time dependent perturbations, etc.

On the ninth day of Christmas, my professor gave to me: nine Slater determinants, etc.

On the tenth day of Christmas, my professor gave to me: ten electrons tunneling, etc.

On the eleventh day of Christmas, my professor gave to me: eleven photons emitting, etc.

On the twelfth day of Christmas, my professor gave to me: 12 fermions exchanging, etc.