Neutrons have mass approximately equal to that of _____________ atoms?

Related Mcqs:

1. 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

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

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

3. 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

4. The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about ______________ metres/second?

   A. 1100
   B. 2200
   C. 3300
   D. 4400

5. 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

6. A moderator _____________ the neutrons?

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

7. 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

8. An electron has a mass that is approximately ____________ that of the proton?

   A. 1836 (approximately)
   B. 1/1836 (approximately)
   C. 1
   D. ∞

9. 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)

10. 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