A.thorium
B.polonium
C.lead
D.radium
Related Mcqs:
- Pitchblende is an ore of
- Monazite sand is a chief source of
- Which one of the following elements is not radioactive?
- Which of the radioactive material is largely associated with bone cancer?
- The rate of disintegration of a radioactive element
- The value of disintegration constant (k) of a radioactive isotope
- In radioactive disintegration ?-rays emission is always accompanied by
- A radioactive element A on radioactive disintegration gives two elements B and C. If B is helium and C is the element of atomic number 90 and atomic weight 234.1 the element A is
- The disintegration constant of a radioactive element is 2.31 x 10-10 years. Its half-life period is about
- The percentage of U-238 in all naturally occurring uranium is about
