The inner most shell of an atom is
K – shell
L- shell
M- shell
N- shell
Which among the following is true ?
A=Z+N
A=2Z
A=Z+2N
A= (Z+N)2
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
Atomic number indicates
No. of nutrones
No. of protons and electrons
No. of protons or electrons
No. of orbits
Which among the following has the highest ionization power?
α – Rays
β- Rays
γ-Rays
X – Rays
1 MeV equals
1.6x10-13 J
1.6x10-23 J
2.42x1045 J
3.2x10-23 J
β-decay results
increase in mass number by 2
decrease in mass number by 1
increase in atomic number by 1
decrease in atomic number by 1
The mass-energy relation was proposed by
Thomson
Rutherford
Bohr
Einstein
1 amu is equal to
9.8 MeV
931.5 Mev
9.31 Mev
93.1 MeV
