The unit of radioactivity curie is equal to_________________?
(A) 3.74 x 109 disintegration per sec
(B) 3.70 x 1010 disintegration per sec
(C) 3.55 x 1010 disintegration per sec
(D) 3.60 x 1010 disintegration per sec
An alpha particle is emitted from 88Ra226. What is the mass and atomic number of the daughter nucleus ?
(A) 224 – 84
(B) 220 – 80
(C) 222 – 86
(D) 226 – 87
Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is______________?
(A) Smaller
(B) Greater than 82
(C) Same
(D) Sometimes smaller some times greater
A mass spectrograph (spectrometer) sorts out____________?
(A) Molecules
(B) Ions
(C) Elements
(D) Isotopes
Strontium-90 is used as __________________?
(A) α-particle source
(B) β-particle source
(C) γ-rays source
(D) Neutron source
An alpha particle in a single encounter__________________?
(A) Loses a small fraction of its energy
(B) Losses most of its energy
(C) Loses no energy at all
(D) Loses all of its energy
Alpha particle ionizes an atom_________________?
(A) Through direct collision
(B) Through electrostatic attraction
(C) Through electrostatic repulsion
(D) All of above
The charge on alpha particles is________________?
(A) Plus one
(B) Plus two
(C) Minus two
(D) Minus one
Sterilization of surgical instruments medical supplies and bandages can be done by exposing them to a beam of_______________?
(A) α-rays
(B) β-rays
(C) γ-rays
(D) B and C have equal antiseptic propertie