The material that slows down the neutrons in a nuclear reactor
moderator
fuel
control rodes
coolant
An elementary particle with a positive charge equal in magnitude to the electrons
neutron
protone
positron
neutrino
The amu is defined as 1/12th of the mass of
Oxygen atom
Hydrogen atom
Carbon atom
Helium atom
1 MeV equals
1.6x10-13 J
1.6x10-23 J
2.42x1045 J
3.2x10-23 J
Which among the following has the highest ionization power?
α – Rays
β- Rays
γ-Rays
X – Rays
If an α-particle is emitted, the atomic number of original nucleus
doubled by 2
reduced by 2
no change
halved
The principle of mass-energy equivalence is given by
E=∆m2c
E=2∆MC2
E=∆2mc
E=∆mc2
Gold foil experiment was done by
Thomson
Rutherford
Lenard
Bohr
Atomic number indicates
No. of nutrones
No. of protons and electrons
No. of protons or electrons
No. of orbits
Which among the following is true ?
A=Z+N
A=2Z
A=Z+2N
A= (Z+N)2
