He

(a)  

Li

(a)  

Be

(a)  

B

(a)  

C

(a)  

N

(a)  

O

(a)  

F

(a)  

Ne

(a)  

Na

(a)  

Mg

(a)  

Al

(a)  

Si

(a)  

P

(a)  

S

(a)  

Cl

(a)  

Ar

(a)  

K

(a)  

Ca

(a)  

Sc

(a)  

Ti

(a)  

V

(a)  

Cr

(a)  

Mn

(a)  

Fe

(a)  

Co

(a)  

Ni

(a)  

Cu

(a)  

Zn

(a)  

Ga

(a)  

Ge

(a)  

As

(a)  

Se

(a)  

Br

(a)  

Kr

(a)  

Rb

(a)  

Sr

(a)  

Y

(a)  

Zr

(a)  

Nb

(a)  

Mo

(a)  

Tc

(a)  

Ru

(a)  

Rh

(a)  

Pd

(a)  

Ag

(a)  

Cd

(a)  

In

(a)  

Sn

(a)  

Sb

(a)  

Te

(a)  

I

(a)  

Xe

(a)  

Cs

(a)  

Ba

(a)  

La

(a)  

Ce

(a)  

Pr

(a)  

Nd

(a)  

Pm

(a)  

Sm

(a)  

Eu

(a)  

Gd

(a)  

Tb

(a)  

Dy

(a)  

Ho

(a)  

Er

(a)  

Tm

(a)  

Yb

(a)  

Lu

(a)  

Hf

(a)  

Ta

(a)  

W

(a)  

Re

(a)  

Os

(a)  

Ir

(a)  

Pt

(a)  

Au

(a)  

Hg

(a)  

Tl

(a)  

Pb

(a)  

Bi

(a)  

Po

(a)  

At

(a)  

Rn

(a)  

Fr

(a)  

Ra

(a)  

Ac

(a)  

Th

(a)  

Pa

(a)  

U

(a)  

Np

(a)  

Pu

(a)  

Am

(a)  

Cm

(a)  

Bk

(a)  

Cf

(a)  

Es

(a)  

Fm

(a)  

Md

(a)  

No

(a)  

Lr

(a)  

Rf

(a)  

Db

(a)  

Sg

(a)  

Bh

(a)  

Hs

(a)  

Mt

(a)  

Ds

(a)  

Rg

(a)  

Cn

(a)  

Nh

(a)  

Fl

(a)  

Mc

(a)  

Lv

(a)  

Ts

(a)  

Og

(a)