The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?

Related Mcqs:

1. Which of the following is a positively charged particle emitted by a radioactive element?

   A. Beta Rays
   B. Alpha Rays
   C. Gamma Rays
   D. None of these

   Submitted by: AKBAR ALI

2. Which one of the following is not a radioactive element ?

   A. Cadmium
   B. Thorium
   C. Radium
   D. Uranium

   Submitted by: Mansoor Ahmed Suhag

3. Radioactive isotope of Uranium used in Nuclear Bomb is ?

   A. 92 U 235
   B. 92 U 234
   C. 92 U 233
   D. 92 U 238

4. The position of an element in the Periodic Table is determined by its __________ number?

   A. Electron
   B. Proton
   C. Neutron
   D. None of these

5. Which element is used as moderator in nuclear reactor?

   A. Light water
   B. Dense water
   C. Fresh water
   D. Heavy water

   Submitted by: Farjan Ahmed Soomro

6. The element used in lead pencils is__________?

   A. Zinc
   B. Lead
   C. Carbon
   D. Tin

   Submitted by: ABDUL HAYEE

7. Diamonds are made up almost entirely of what element?

   A. Carbon
   B. Helium
   C. Methane
   D. Nitrogen

   Submitted by: Ashfaque Ali Khoso

8. Which of the following is a transition element?

   A. Cl
   B. Cu
   C. S
   D. None of these

   Submitted by: Majid Ali

9. Which element is called earth maker?

   A. Oxygen
   B. Silicon
   C. Carbon
   D. Hydrogen

   Submitted by: Mansoor Ahmed Suhag

10. Which element has the third most % in human body?

    A. Oxygen 65%
    B. Calcium 75%
    C. Hydrogen 10%
    D. Carbon 18%

    Submitted by: Syed Nizakat Ali Shah