A. 1
B. 0.5
C. 2
D. 4
Related Mcqs:
- 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 - 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 - The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
A. 159
B. 1837
C. 2537
D. 10000 - Neutrons have mass approximately equal to that of _____________ atoms?
A. Hydrogen
B. Helium
C. Deuterium
D. None of these - 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 - The atomic number of a radioactive element is not changed, when it emits _____________ rays?
A. α
B. β
C. γ
D. α & β - 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. - 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 - Energy equivalent to one atomic mass unit (amu) is ______________ MeV?
A. 9.31
B. 93.1
C. 931
D. 9310 - Nuclides having the same atomic numbers are termed as___________________?
A. Isotopes
B. Isomers
C. Isotones
D. Isobars
