Atomic Number: 81
THALLIUM
Tl
Atomic Number: 82
LEAD
PB
Atomic Number: 83
BISMUTH
Bi
Atomic Number: 84
POLONIUM
Po
Atomic Number: 85
ASTATINE
At
Atomic Number: 86
RADON
Ra
Atomic Number: 87
FRANCIUM
Fr
Atomic Number: 88
RADIUM
Ra
Atomic Number: 89
ACTINIUM
Ac
Atomic Number: 90
THORIUM
Th