In the earth, only those radioactive elements are found naturally which

Question

In the earth, only those radioactive elements are found naturally which (A) have less half-life time (B) have more half-life time (C) lie deep inside earth (D) lie on the surface of earth

Tardigrade Admin · Accepted Answer

Those radioactive elements whose half-life is short compared to the age of the universe (13.7 billion years) are not found in observable quantities in nature today. They have, however, been seen in the laboratory in nuclear reactions. Tritium and plutonium belong to this category.

Q. In the earth, only those radioactive elements are found naturally which

have less half-life time

have more half-life time

lie deep inside earth

lie on the surface of earth

Those radioactive elements whose half-life is short compared to the age of the universe (13.7 billion years) are not found in observable quantities in nature today. They have, however, been seen in the laboratory in nuclear reactions. Tritium and plutonium belong to this category.