Question : Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
A. Radan
B. Plutonium
C. Radium
D. Thorium
Question Listed : Thorium, Nuclear Science,
Question : Monazite is an ore of
A. thorium
B. iron
C. zirconium
D. titanium
Question Listed : Thorium, Elements, Metals,