A. Electron
B. α-particle
C. Proton
D. Neutron
Related Mcqs:
- In the nuclear reaction, 93N239→ 94Pu239 + ?; the missing particle is a/an__________________?
A. Electron
B. Proton
C. Neutron
D. Position - “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 - 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 - “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 - Neutrons have mass approximately equal to that of _____________ atoms?
A. Hydrogen
B. Helium
C. Deuterium
D. None of these - _____________ have the same mass number, but different nuclear charge ?
A. Isotopes
B. Isobars
C. Isotones
D. None of these - 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) - An electron has a mass that is approximately ____________ that of the proton?
A. 1836 (approximately)
B. 1/1836 (approximately)
C. 1
D. ∞ - 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 - The critical mass of a fissionable material can be reduced by__________________?
A. Heating it
B. Cooling it
C. Surrounding it by neutron reflecting material
D. Surrounding it by neutron absorbing material
