April 2020
Intermediate to advanced
296 pages
5h 20m
English

The most abundant actinoid . . . “found” second time around,
Its white-hot oxide mantles once in gas lamps did abound.
Helps TIG rods weld and arc away,
Its fissile cores might rule one day.
Yet Thorotrast’s delayed effects proved costly and profound.
SECOND IN THE ACTINOID SERIES
Thorium is the most abundant of the 15 radioactive and chemically similar actinoids spanning from actinium to lawrencium in row 7 on the periodic table. Thorium is roughly four times more plentiful in Earth’s crust than uranium and about five times more abundant ...