Atomic Structure

A. Fast neutrons
B. Slow neutrons
C. Moderate neutrons
D. All are possible

A. 7f
B. 7s
C. 7p
D. 7d

A. Attractive forces
B. Repulsive force
C. Electrons
D. Neutrons

A. Electron
B. Positron
C. Neutron
D. None of above has such capability

A. n
B. 1
C. m
D. s

A. Moseley
B. Davisson and Germer
C. Einstein
D. Roentgen

A. Orbit is cylindrical
B. Orbit is elliptical
C. Orbit is longitudinal
D. Orbit is asymmetrical

A. when electrons jump down to 2nd- orbit
B. when electrons jump down to 3rd- orbit
C. when electrons jump down to 4th- orbit
D. when electrons jump down to 5th- orbit

A. 1
B. 3
C. 5
D. 7

A. Gamma-rays
B. Alpha-rays
C. Beta-rays
D. X-rays