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

A. 224 – 84
B. 220 – 80
C. 222 – 86
D. 226 – 87

A. Smaller
B. Greater than 82
C. Same
D. Sometimes smaller some times greater

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

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

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. Antiproton
B. Positron
C. Gamma rays
D. Photon

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

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

A. α-rays
B. β-rays
C. γ-rays
D. All of above have the same speed