atomic mass
16
Sulfur
Be
Beryllium
Cesium
Cs
Eu
Europium
53
Iodine
23
Vanadium
Kr
Krypton
Samarium
Sm
Xe
Xenon
34
Selenium
32
Germanium
Y
Yttrium
Gadolinium
Gd
Ag
Silver
41
Niobium
40
Zirconium
Ru
Ruthenium
Ytterbium
Yb
Mo
Molybdenum
66
Dysprosium
43
Technetium
Sn
Tin
Tungsten
W
Tb
Terbium
59
Praseodymium