The atomic mass of an element is fractional, because ______________________?

Related Mcqs:

1. The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element ?

   A. A + Z B. A – Z C. A D. Z...

2. The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is ___________________?

   A. 1 B. 0.5 C. 2 D. 4...

3. The atomic number of a radioactive element is not changed, when it emits _____________ rays?

   A. α B. β C. γ D. α & β...

4. The atomic number of an element is equal to the number of ______________ present in its atom?

   A. Neutrons B. Electrons C. Protons D. Either B. or C....

5. When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as____________________?

   A. Isomers B. Isotopes C. Isobars D. Isotones...

6. Energy equivalent to one atomic mass unit (amu) is ______________ MeV?

   A. 9.31 B. 93.1 C. 931 D. 9310...

7. The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to ______________ gm?

   A. 1/4 B. 1/8 C. 1/2 D. 1/16...

8. The mass number of an element is equal to the number of _____________ in the nucleus?

   A. Electrons B. Neutrons C. Protons D. Neutrons plus protons (i.e., nucleons)...

9. The mass number of an element is not changed, when it emits _______________ radiations?

   A. α & β B. β & γ C. γ & α D. α, β, & γ...

10. “Critical mass” is the minimum mass of nuclear fissile material required for the_______________________?

    A. Sustainment of chain reaction B. Power generation on commercial scale C. Economic power generation D. None of these...