Test yourself on Lesson 7

Which one of these is a particle given off by a radioactive element?
1. Alpha
2. Gamma
3. Theta
4. Kappa
Which one of these is an electromagnetic radiation given off by a radioactive element?
1. Alpha
2. Beta
3. Gamma
4. Delta
An alpha particle is
1. helium atom
2. helium nucleus
3. helium electron
4. random part of the nucleus
Background radiation is due to:
1. Fall out from atomic bomb tests during the Nineteen Fifties
2. a leaky container of a radioactive source.
3. the imagination of a physics teacher who wants to make the demonstration more complicated.
4. radioactive materials that are naturally in the ground.
Which one of these statements is correct?
1. Alpha, beta, and gamma are all deflected by a magnetic field.
2. When alpha and beta particles pass through a magnetic field, they are deflected in opposite directions.
3. When alpha and beta particles pass through a magnetic field, they are deflected in the same direction.
4. Only gamma rays are defelected by a magnetic field.