Chemistry 1100 Ch 5
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9 Terms
what happens when a hydrogen atom absorbs light?
the energy of the photon converts it from the ground state to an excited state, transferring an electron to an orbital larger and less stable
what is ionization energy?
the energy required to remove one electron from an atom
what is screening
electron-electron repulsion, cancelling a portion of the attraction between the nucleus and the incoming electron
the higher the value of the quantum number n, the more that orbital is…
screened by electrons in smaller more stable orbitals
the higher the value of the quantum number L, the more…
that electrons in that orbital are screened from their nuclear charge by electrons in smaller, more stable orbitals
photoelectron spectroscopy…
gives us quantitative info about energies of atomic orbitals
what is Z off?
an electrons net attraction
what is the Pauli exclusion principle?
each electron in an atom has a unique set of four quantum numbers, (n, l, ml and ms)
what is the Aufbau principle?
we place electrons in orbitals starting wit the lowest energy orbital following the Pauli exclusion principle