Respostas
a) 1s2, 2s2, 2p6, 3s2
b) 1s2, 2s2, 2p6, 3s2, 3p6, 4s2
c) 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d6
d) 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p5
e) 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6, 5s2, 4d10, 5p6, 6s2
f: 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6, 5s2, 4d10, 5p6, 6s2, 4f14, 5d10, 6p6
g:1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6, 5s2, 4d10, 5p6, 6s2, 4f14, 5d10, 6p6, 7s2, 5f14, 6d2
Mg(12)=1s 2s 2p 3s
Ca(20)=1s 2s 2p 3s 3p 4s
Fe(26)=1s 2s 2p 3s 3p 4s 3d^6
Br(35)=1s 2s 2p 3s 3p 4s 3d 4p^5
Ba(56)=1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s
Rr(86)=1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p
Rf(104)=1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d^2
A)Mg=3s,Ca=4s,Fe=3d^6,Br=4p^5,Ba=6s,Rr=6p,Rf=6d^2
B)Mg=2,Ca=2,Fe=2,Br=7,Ba=2,Rr=8,Rf=2
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