Atomic Number: 51
ANTIMONY
Sb
Atomic Number: 52
TELLURIUM
Te
Atomic Number: 53
IODINE
I
Atomic Number: 54
XENON
Xe
Atomic Number: 55
CAESIUM
Cs
Atomic Number: 56
BARIUM
Ba
Atomic Number: 57
LANTHANUM
La
Atomic Number: 58
CERIUM
Ce
Atomic Number: 59
PRASEODYMIUM
Pr
Atomic Number: 60
NEODYMIUM
Nd