原子の電子配置
第１周期
H(1s)1
He(1s)2
第２周期
Li(1s)2(2s)1
Be(1s)2(2s)2
B(1s)2(2s)2(2p)1
C(1s)2(2s)2(2p)2
N(1s)2(2s)2(2p)3
O(1s)2(2s)2(2p)4
F(1s)2(2s)2(2p)5
Ne(1s)2(2s)2(2p)6
第３周期
Na(1s)2(2s)2(2p)6(3s)1
Mg(1s)2(2s)2(2p)6(3s)2
Al(1s)2(2s)2(2p)6(3s)2(3p)1
Si(1s)2(2s)2(2p)6(3s)2(3p)2
P(1s)2(2s)2(2p)6(3s)2(3p)3
S(1s)2(2s)2(2p)6(3s)2(3p)4
Cl(1s)2(2s)2(2p)6(3s)2(3p)5
Ar(1s)2(2s)2(2p)6(3s)2(3p)6
第４周期
K[Ar](4s)1
Ca[Ar](4s)2
Sc[Ar](4s)2(3d)1
Ti[Ar](4s)2(3d)2
V[Ar](4s)2(3d)3
Cr[Ar](4s)1(3d)5
Mn[Ar](4s)2(3d)5
Fe[Ar](4s)2(3d)6
Co[Ar](4s)2(3d)7
Ni[Ar](4s)2(3d)8
Cu[Ar](4s)1(3d)10
Zn[Ar](4s)2(3d)10
Ga[Ar](4s)2(3d)10(4p)1
Ge[Ar](4s)2(3d)10(4p)2
As[Ar](4s)2(3d)10(4p)3
Se[Ar](4s)2(3d)10(4p)4
Br[Ar](4s)2(3d)10(4p)5
Kr[Ar](4s)2(3d)10(4p)6
第５周期
Rb[Kr](5s)1
Sr[Kr](5s)2
Y[Kr](5s)2(4d)1
Zr[Kr](5s)2(4d)2
Nb[Kr](5s)1(4d)4
Mo[Kr](5s)1(4d)5
Tc[Kr](5s)1(4d)6
Ru[Kr](5s)1(4d)7
Rh[Kr](5s)1(4d)8
Pd[Kr](4d)10
Ag[Kr](5s)1(4d)10
Cd[Kr](5s)2(4d)10
In[Kr](5s)2(4d)10(5p)1
Sn[Kr](5s)2(4d)10(5p)2
Sb[Kr](5s)2(4d)10(5p)3
Te[Kr](5s)2(4d)10(5p)4
I[Kr](5s)2(4d)10(5p)5
Xe[Kr](5s)2(4d)10(5p)6
第６周期
Cs[Xe](6s)1
Ba[Xe](6s)2
La[Xe](6s)2(5d)1
Ce[Xe](6s)2(4f)2
Pr[Xe](6s)2(4f)3
Nd[Xe](6s)2(4f)4
Pm[Xe](6s)2(4f)5
Sm[Xe](6s)2(4f)6
Eu[Xe](6s)2(4f)7
Gd[Xe](6s)2(4f)7(5d)1
Tb[Xe](6s)2(4f)9
Dy[Xe](6s)2(4f)10
Ho[Xe](6s)2(4f)11
Er[Xe](6s)2(4f)12
Tm[Xe](6s)2(4f)13
Yb[Xe](6s)2(4f)14
Lu[Xe](6s)2(4f)14(5d)1
Hf[Xe](6s)2(4f)14(5d)2
Ta[Xe](6s)2(4f)14(5d)3
W[Xe](6s)2(4f)14(5d)4
Re[Xe](6s)2(4f)14(5d)5
Os[Xe](6s)2(4f)14(5d)6
Ir[Xe](6s)2(4f)14(5d)7
Pt[Xe](6s)1(4f)14(5d)9
Au[Xe](6s)1(4f)14(5d)10
Hg[Xe](6s)2(4f)14(5d)10
Tl[Xe](6s)2(4f)14(5d)2(6p)1
Pb[Xe](6s)2(4f)14(5d)2(6p)2
Bi[Xe](6s)2(4f)14(5d)2(6p)3
Po[Xe](6s)2(4f)14(5d)2(6p)4
At[Xe](6s)2(4f)14(5d)2(6p)5
Rn[Xe](6s)2(4f)14(5d)2(6p)6
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