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Unformatted text preview: nciple quantum number (known as n)
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n=1>ground or lowest energy orbit • The values of n are integers 1,2,3, etc. with n = 1 representing
the orbit closest to the nucleus. 17 Absorption and emission energy if n= 3,4,5 or 6,
comes back to 2second allowable
energy levelvisible
region.colors will be
different for
different orbitals. minimum infinity • Calculated orbital energies will
always be negative.
• The more negative the value, the
more stable the orbit. The most
stable orbit is for n = 1 (ground
state).
• When an e is not in the lowest
available orbit it is in an
second allowable energy level.
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• The energy is negative as it
takes energy to unbind (ionize)
the e from the nucleus.
• An unbound electron has zero
(binding) energy. n=1 to n=2give off light in
UV region. if goes from n=2 to
1UV again. from allowable
range to ground state will
always yield UV light. principle quantum no. 18 9 05Sep13 from outer to 1 from outer to 2
from outer to 3 19 Absorption and emission energy (cont)
Bohr completed his model by concluding that the electron
could “jump” from on...
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 Fall '14
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