THE RADON DECAY SEQUENCE
alpha decays are indicated by an "a",
beta decays are indicated by a "B"

U-238(a)-->
Th-234(B)-->
Pa-234(B)-->
U-234(a)-->
Th-230(a)-->
Rn-226(a)-->
Rn-222(a)-->
Po-218(a)-->
Pb-214(B)-->
Bi-214-->
Po-214(a)-->
Pb-210(B)-->
Bi-210(B)-->
Po-210(a)-->
Pb-206 (STABLE LEAD ISOTOPE)