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abbreviated electron configuration = e.c.
The abbreviated electron configuration of sodium is [Ne]3s1.
The electron configuration of nobelium is [Rn]5f14.7s2.
The electron configuration of boron is [He]2s2.2p1.
The abbreviated electron configuration for argon is [Ne] 3s^2 3p^6. The [Ne] represents the electron configuration of the noble gas neon, which has the same electron configuration as the inner electrons of argon.
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[Kr]
[He] 2s one
The electron configuration of americium is [Rn]5f7.7s2.
the abbreviated electron configuration of sodium is (Ne) 3s1
1s2 2s2 2p6
The best known oxide of silver is Ag2O