Thorium, plutonium and iron are radioactive (be sure, the natural isotope 54Fe is radioactive !).
Chemical elements have chemical symbols not a formula. Examples: Ne, C, Ir, Fe, Zr, U, Pu, K, Na, Au, Sr, Mg, Ca, Li, Tc, Am, No, Rn, Ra, Th, B etc.
Th is element number 90 on the periodic table It is thorium, it is in the Actinides, and it is radioactive
Radioactive element of either Actinide/Lanthanide Series
Since the material will lose one half the initial amount in the first 12,000 yrs. and then one half the remainder each additional 12,000 yrs, the amount remaining after 36,000 years will be 1/8'th the original amount. 1/2 remains after 12,000, then 1/2 of the half, or 1/4 remains after the second 12,000, and 1/2 the quarter, or 1/8'th after the third 12,000 years.
The first radioactive element formed when uranium-238 decays is thorium-234. Uranium-238 undergoes alpha decay to form thorium-234.
Pu Th
Chemical elements have chemical symbols not a formula. Examples: Ne, C, Ir, Fe, Zr, U, Pu, K, Na, Au, Sr, Mg, Ca, Li, Tc, Am, No, Rn, Ra, Th, B etc.
These symbols are the standardized symbols for chemical elements: some examples are Na, K, Li, Ca, Mg, Th, Cu, Fe etc.
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Th is element number 90 on the periodic table It is thorium, it is in the Actinides, and it is radioactive
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Thorium Th Cheers Sharath
Th symbol is used for Thorium element.It has atomic number 90.It is a radioactive actinide metal.
when it ends.
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They are all words that have all of the vowels (A, E, I, O, U) in alphabetical order.
Uranium is a solid metal, radioactive, very dense, with the appearance of th steel, no odor.