Alpha particle ionizes an atom_________________?

A. Through direct collision
B. Through electrostatic attraction
C. Through electrostatic repulsion
D. All of above

T.V sets and microwave ovens emit ___________________?

A. X-rays
B. Α-rays
C. Β-rays
D. Γ-rays

Radioactive materials can be identified by measuring their_______________?

A. Hardness
B. Density
C. Mass
D. Half life

Which one of the following radiations possesses maximum velocity ?

A. Α-rays
B. Β-rays
C. Γ-rays
D. All of above have the same speed

The charge on an electron was determine by ________________?

A. Ampere
B. Maxwell
C. Millikan
D. Thomson

The charge on neutron is_______________?

A. Plus 1.6 x 10-19c
B. Zero
C. Minus 1.6 x 10-19c
D. No definite charge

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

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

Nuclei having the same mass number but different atomic number are____________?

A. Isotopes
B. Isobars
C. Isotones
D. Isomers

A mass spectrograph (spectrometer) sorts out____________?

A. Molecules
B. Ions
C. Elements
D. Isotopes