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 ?

Related Mcqs:

1. 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...

2. 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....

3. Out of the following, nucleus of _____________ atom contains the largest number of neutrons?

   A. U-235 B. U-238 C. U-239 D. Pu-239...

4. How many atoms are present in one gm-atom of an element ?

   A. 2 × 1023 B. 6 × 1023 C. 6 × 1032 D. 5 × 105...

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

   A. α B. β C. γ D. α & β...

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

   A. Of uncertainty principle B. It may have isobars C. It contains neutrons D. It may have isotopes...

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. Thermal neutrons which are used to cause the fission of U-235 have energy _____________ eV?

   A. < 0.025 B. > 1 C. 1-25 D. > 200...

9. Atoms with same number of neutrons, but different number of nucleons are called___________________?

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

10. A moderator _____________ the neutrons?

    A. Slows down B. Absorbs C. Accelerates D. Reflects...