The ?-particle is identical with
A.a helium atom
B.a doubly charged helium ion
C.proton
D.fast moving neutron
Category: Nuclear Engineering Mcqs
Since the mass defect of the helium nucleus is 5.045 x 10-26 gm its binding energy must be
A.5.045 x 10-26 erg
B.4.54 x 10-5 erg
C.4.54 x 10-5 J
D.5.045 x 10-26 J
In ?-decay the ratio of neutron to proton
A.remains unchanged
B.decreases
C.increases
D.may decrease or increase
Heavy water is used in nuclear reactors to
A.cool the reactor
B.facilitate the release of neutrons
C.control fission
D.slow down the speed of neutrons
The mass of helium is about
A.half of the mass of neutron
B.one-fourth of the mass of proton
C.twice the mass of deuterium
D.same as the mass of tritium
Inside the sun
A.four nuclei of hydrogen combine together to form one nucleus of helium
B.four nuclei of hydrogen combine together to form two nuclei of helium
C.four nuclei of hydrogen combine together to form four nuclei of helium
D.one nucleus of hydrogen is transformed into one nucleus of helium.
The electron volt is the unit of
A.energy
B.momentum
C.potential difference
D.charge
The neutron to proton ration in a stable nucleus is about
A.2:01
B.1:01
C.1:02
D.1.6 : 1
Atoms of U-235 and U-238 differ in structure by
A.three electrons
B.three protons
C.three neutrons
D.three electrons and three protons
The emission of an ?-particle causes the resultant nucleus to have
A.less atomic weight and less atomic number
B.less atomic weight and more atomic number
C.more atomic weight and more atomic number
D.more atomic weight and less atomic number
