91

Pa

Protactinium

H
Li
Na
K
Rb
Cs
Fr
Be
Mg
Ca
Sr
Ba
Ra
Sc
Y
Ti
Zr
Hf
Rf
La
Ac
V
Nb
Ta
Db
Ce
Th
Cr
Mo
W
Sg
Pr
Pa
Mn
Tc
Re
Bh
Nd
U
Fe
Ru
Os
Hs
Pm
Np
Co
Rh
Ir
Mt
Sm
Pu
Ni
Pd
Pt
Ds
Eu
Am
Cu
Ag
Au
Rg
Gd
Cm
Zn
Cd
Hg
Cn
Tb
Bk
B
Al
Ga
In
Tl
Nh
Dy
Cf
C
Si
Ge
Sn
Pb
Fl
Ho
Es
N
P
As
Sb
Bi
Mc
Er
Fm
O
S
Se
Te
Po
Lv
Tm
Md
F
Cl
Br
I
At
Ts
Yb
No
He
Ne
Ar
Kr
Xe
Rn
Og
Lu
Lr

*

**

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