What were the contributions of de Broglie, Hund, and Pauli to our understanding of the atom?
1 Answer
Jul 7, 2017
See below.
Explanation:
de Broglie - particle-wave duality
Showed that electrons can act as waves, where their wavelength is inversely proportional to the electron's momentum,
#lambda=h/p# ,where:
#lambda# = de Broglie wavelength in#m# #h# = Planck's constant (#6.626*10^-34Jcdot s# )#p# = electron's momentum in#kg cdot m//s#
Hund - Hund's rule of maximum multiplicity
An orbital in a subshell tends to fill with one electron before it gets two electrons, and these electrons in singly occupied orbitals ought to have the same spin.
[NOTE: exceptions occur when the orbitals get big enough.]
Pauli - Pauli's exclusion principle
Two electrons in the same orbital cannot have the same set of four quantum numbers:
- principal quantum number (
#n# )- orbital angular momentum quantum number (
#l# )- magnetic quantum number (
#m_l# )- spin quantum number (
#m_s# ).If both were to reside in the same orbital, they automatically have 3 identical quantum numbers, so their spins must be opposite.
