The age of ancient biological material is determined by using
Ionizing power
Radio Carbon-dating
Radio activity
Radio therapy
If an α-particle is emitted, the atomic number of original nucleus
doubled by 2
reduced by 2
no change
halved
Which among the following is true ?
A=Z+N
A=2Z
A=Z+2N
A= (Z+N)2
The smallest unit of an element is called
molecule
ion
atom
neucleus
The inner most shell of an atom is
K – shell
L- shell
M- shell
N- shell
Atom of an element is
positively charged
nutral
negatively charged
indivisible
An elementary particle with a positive charge equal in magnitude to the electrons
neutron
protone
positron
neutrino
Neutral radiations are
α – Rays
β- Rays
γ-Rays
X– Rays
1 amu is equal to
9.8 MeV
931.5 Mev
9.31 Mev
93.1 MeV
Atomic number of an atom is denoted by
A
B
Z
M
