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Elements columns 3&4
Boron
B
aluminum
Al
Gallium
Ga
indium
in
thallium
Tl
carbon
c
silicon
si
germanium
ge
tin
sn
lead
pb
nitrogen
n
Phosphorus
p
Arsenic
As
Antimony
Sb
Bismuth
bi
oxygen
o
sulfer
s
selenium
se
tellurium
te
fluorine
f
chlorine
cl
bromine
br
iodine
i
astatine
at
helium
he
neon
ne
argon
ar
krypton
kr
xenon
xe
radon
Rn