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01-01-2015
Chemistry

Answered

What are the electronic configurations for the first twenty elements

Answer :

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02-01-2015

H 1s¹
He 1s²
Li [He] 2s¹
Be [He] 2s²
B [He]2s²2p¹
C [He]2s¹2p²
N   [He] 2s²2p³
O   [He]2s²2p⁴
F    [He]2s²2p⁵
Ne [He]2s2p⁶
Na   [Ne]3s¹
Mg [Ne]3s²
Al [Ne]3s²3p¹
Si [Ne]3s²3p²
P [Ne]3s²3p³
S [Ne]3s²3p⁴
Cl [Ne]3s²3p⁵
Ar [Ne]3s²3p⁶
K [Ar]4s¹
Ca [Ar]4s²

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