The half-life period of a radioactive element is 10 years. How long it takes to reduce to 12.5% of its original weight?
A.20 years
B.30 years
C.40 years
D.125 years
Category: Nuclear Engineering Mcqs
Chain reaction is 92U238 will decrease if
A.its mass exceeds critical mass
B.its mass is just equal to critical mass
C.its mass is less than critical mass
D.all of these answers.
Laser is an acronym for light amplification by
A.stimulated emission of radiation
B.spontaneous emission of radiation
C.stimulated energetic radiation
D.spontaneous emission of radio waves
India entered the nulear energy club as
A.fourth nation of the world
B.fifth nation of the world
C.sixth nation of the world
D.seventh nation of the world
Which of the following properties of elements is a whole number?
A.Atomic weight
B.Atomic radius
C.Atomic volume
D.Atomic number
Positive ions are formed from neutral atoms by the loss of
A.neutrons
B.protons
C.electrons
D.mesons
The nucleus of an atom consists of
A.protons only
B.protons and electrons
C.protons and neutrons
D.protons neutrons and electrons
The distance between nucleons in atomic nucleus is of the order of
A.200 Fermi
B.2 Fermi
C.50 Fermi
D.1000 Fermi
Pitchblende is an ore of
A.radium
B.thorium
C.polonium
D.uranium
Which metal is most important in atomic research?
A.Cd
B.U
C.Pb
D.Fe
