H
hydrogen
He
helium
Li
lithium
Be
beryllium
B
boron
C
carbon
N
nitrogen
O
oxygen
F
fluorine
Ne
neon
Na
sodium
Mg
magnesium
Al
aluminum
Si
silicon
P
phosphorus
S
sulfur
Cl
chlorine
Ar
argon
K
potassium
Ca
calcium
Sc
scandium
Ti
titanium
V
vanadium
Cr
chromium
Mn
manganese
Fe
iron
Co
cobalt
Ni
nickel
Cu
copper
Kr
krypton
Rb
rubidium
Sr
strontium
Ag
silver
Sn
tin
I
iodine
Cs
cesium
Zn
zinc
Ga
gallium
Ge
germanium
As
arsenic
Se
selenium
Br
bromine
Ba
barium
Au
gold
Hg
mercury
Pb
lead
Rn
radon
U
uranium
Pu
plutonium
Studied by 44 People