Electron Configuration and the Periodic Table
Electron Configuration
and the Periodic Table
Total Energy
2s
3s
4s
5f
4f
5s
6s
7s
6p5d
6d
1s
spdf
1s
2s
2p
3s
3p
3d
4s
4p
4d
4f
5s
5p
5d
5f
2p
3p
3d
4p
4d
5p
6s
energy
Total Energy
2s
3s
4s
5f
4f
5s
6s
7s
6p5d
6d
1s
spdf
1s
2s
2p
3s
3p
3d
4s
4p
4d
4f
5s
5p
5d
5f
2p
3p
3d
4p
4d
5p
6s
These diagrams show how the order of atomic energy levels
corresponds to the arrangement of elements in the periodic table.
With each increment in atomic number one electron is added to the
energy diagram. Electrons are added from the lowest level. Each
level can accommodate at most an electron pair at which point that
level is considered “full” (Pauli exclusion principle). Once a level
(or a set of degenerate levels) is filled, a jump in energy is required to
reach the energy of the next available level. This jump corresponds to
movement to a new section of the periodic table (an exception is the
filling of the 1s level, in which case there is a jump from the upper left
corner to the upper right corner). !
The most significant point
is this: the degeneracy in
the energy levels matches
the number of elements in
each section of the periodic
table (note the color coding
between the two diagrams).!
Page 1/4
Free Download
Electron Configuration and the Periodic Table PDF
Favor this template? Just fancy it by voting!
(0 Votes)
0.0
Related Forms
