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
Atom of an element is
positively charged
nutral
negatively charged
indivisible
Which among the following is true ?
A=Z+N
A=2Z
A=Z+2N
A= (Z+N)2
Which among the following has the highest ionization power?
α – Rays
β- Rays
γ-Rays
X – Rays
The smallest unit of an element is called
molecule
ion
atom
neucleus
The material that slows down the neutrons in a nuclear reactor
moderator
fuel
control rodes
coolant
The age of ancient biological material is determined by using
Ionizing power
Radio Carbon-dating
Radio activity
Radio therapy
Gold foil experiment was done by
Thomson
Rutherford
Lenard
Bohr
Atomic number of an atom is denoted by
A
B
Z
M
1 MeV equals
1.6x10-13 J
1.6x10-23 J
2.42x1045 J
3.2x10-23 J
