Transcript Electron configuration

Electron
configuration
How are they organized?
Electron configuration

How are electrons arranged around
an atom?
Electrons are in energy levels that
have sublevels and orbitals.
 DP likes to use numbers to represent
the electrons.
 2, 8, 10, 2
 2, 8, 18, 4
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Electron configuration
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What are energy levels, sublevels and
orbitals?
Energy levels are the shells numbered
1-7.
 Sublevels are s, p, d, and f.
 Orbitals are the different shapes of
each electron probability around the
nucleus that hold electrons.
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Electron configuration
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So, how do we write the configuration
of Br?
They are written by energy level,
sublevel and number of electrons in
that energy level for all electrons.
 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p5
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Electron configuration
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How do we know what each energy
level, sublevel and orbital can hold?
Energy level is 2n2
 Sublevel is 2, 6, 10, 14 from the
groups on the periodic table.
 Orbitals each hold just 2 electrons.
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Electron configuration
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How can we tell that there are main energy
levels and sublevels?
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Ionization energy changes between different
stable states of an atom.
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More stable means more energy
Electron configuration
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Who helped us figure these things
out?
Schrodeniger and Heisenberg
 Aufbau
 Pauli
 Hund
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Electron configuration
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How do we use these rules to draw
electrons in boxes?
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It follows the same basic steps except
we now add spin.
Electron configuration
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Draw the electron configuration and
spin diagram for Ga.
Electron configuration
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How would we use this with an ion of
an element?
+ ions lose electrons, and – ions gain
electrons.
 Fill out the structure and add or
subtract accordingly.
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