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
Category: Nuclear Engineering Mcqs
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
A radioactive substance gives off Y-rays when
A.its nucleus goes from a higher energy state to a lower one
B.one of the orbital electrons jumps from a higher orbit to one of a lower energy
C.an orbital electron jumps from a lower orbit to a higher one
D.its nucleus goes from a lower energy state to a higher one
In an atom the electrons
A.move round the nucleus at random
B.are embedded in space around the nucleus
C.are distributed as three dimensional charge clouds around the nucleus
D.are stationary in various energy levels
In a nuclear explosion the energy is released in the form of
A.electrical energy
B.thermal energy
C.kinetic energy
D.potential energy
Deuterium atom has
A.2 electrons in the outermost orbit
B.two protons in the nucleus
C.two neutrons in the nucleus
D.one proton and one neutron in the nucleus
