Radioactive decay obeys which one of the following law:
A. N=Noe-λt
B. N=Noeλt
C. N=Noe-λt/2
D. No=N(1+eλt)
The diameter of an atom is approximately:
A. 10-12m
B. 10-11m
C. 10-10m
D. 10-14m
Mass defect per nucleon is:
A. The binding energy of the nucleus
B. Packing fraction
C. The average energy of the nucleus
D. All of above are one and the same thing
Nuclear forces exist between:
A. Proton-proton
B. Proton-neutron
C. Neutron-neutron
D. All of the above
Transuranic elements have an atomic number:
A. Greater than 72
B. Greater than 82
C. Greater than 92
D. Greater than 102
Radioactivity is a ______ (A) Spontaneous activity (B) Chemical property:
A. A & B
B. B & C
C. C & A
D. A B & C
A mass spectrograph (spectrometer) sorts out:
A. Molecules
B. Ions
C. Elements
D. Isotopes
Nuclei having the same mass number but different atomic number are:
A. Isotopes
B. Isobars
C. Isotones
D. Isomers
Mass of neutron is:
A. 1.67 x 10-31 kg
B. 1.67 x 10-27 kg
C. 9.1 x 10-31 kg
D. 1.67 x 10-19 kg
A particle having the mass of an electron and the charge of a proton is called a:
A. Antiproton
B. Positron
C. Gamma rays
D. Photon
