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

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

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

3. 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...

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

   A. α B. β C. γ D. α & β...

5. 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...

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. 75% of a radioactive element decays in 6 hours. Its half life period is ______________ hours?

   A. 3/4 B. 1/6 C. 3 D. 4...

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

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

9. The ratio of volume of an atom to that of its nucleus is__________________?

   A. 1012 B. 10-12 C. 10-8 D. 108...

10. The ratio of atomic radius to its nuclear radius is about___________________?

    A. 105 B. 108 C. 1012 D. 1015...