2562835
Pregunta 1
Pregunta
Ernest Rutherford came up with the 'Plum Pudding' model.
Respuesta
- True
- False
Pregunta 2
Pregunta
In 1909, Rutherford tried firing alpha particles at thin gold foil to see what happened.
Respuesta
- True
- False
Pregunta 3
Pregunta
Most of the alpha particles in Rutherford's experiment went straight through the gold foil. What did Rutherford figure out from this?
Respuesta
-
Gold is mostly empty space.
-
The nucleus of an atom is very small compared to the rest of it.
-
There are positive particles in the atom.
-
Alpha particles cannot travel very far.
Pregunta 4
Pregunta
Some of the alpha particles in Rutherford's experiment deflected when they through the gold foil. What did Rutherford figure out from this?
Respuesta
-
Gold is mostly empty space.
-
The nucleus of an atom is very small compared to the rest of it.
-
There are positive particles in the atom.
-
Alpha particles cannot travel very far.
Pregunta 5
Pregunta
A few of the alpha particles in Rutherford's experiment bounced straight back from the gold foil. What did Rutherford figure out from this?
Respuesta
-
Gold is mostly empty space.
-
The nucleus of an atom is very small compared to the rest of it.
-
There are positive particles in the atom.
-
Alpha particles cannot travel very far.
Pregunta 6
Pregunta
Rutherford's idea was only accepted after his death.
Respuesta
- True
- False
Pregunta 7
Pregunta
Radioactive decay is a random process.
Respuesta
- True
- False
Pregunta 8
Pregunta
Which type of radiation is a fast moving electron?
Respuesta
-
Gamma
-
Delta
-
Alpha
-
Beta
Pregunta 9
Pregunta
Beta radiation is the only type of radiation that is not a particle.
Respuesta
- True
- False
Pregunta 10
Pregunta
What type of radiation has an unlimited range in air?
Respuesta
-
Gamma
-
Delta
-
Alpha
-
Beta
Pregunta 11
Pregunta
Paper can stop alpha particles.
Respuesta
- True
- False
Pregunta 12
Pregunta
Which type of radiation has the same structure as a helium nucleus?
Respuesta
-
Gamma
-
Delta
-
Alpha
-
Beta
Pregunta 13
Pregunta
Alpha particles pose no risk to humans.
Respuesta
- True
- False
Pregunta 14
Pregunta
What type of radiation source do many people have in their homes?
Respuesta
-
Gamma
-
Delta
-
Alpha
-
Beta
Pregunta 15
Pregunta
Alpha particles can only travel a few centimetres in air.
Respuesta
- True
- False
Pregunta 16
Pregunta
What is the relative charge and relative mass of an alpha particle?
Respuesta
-
Relative charge: +4 Relative mass: 4
-
Relative charge: -1 Relative mass: 0
-
Relative charge: +2 Relative mass: 0
-
Relative charge: +2 Relative mass: 4
Pregunta 17
Pregunta
What is the relative charge and relative mass of a beta particle?
Respuesta
-
Relative charge: +4 Relative mass: 4
-
Relative charge: -1 Relative mass: 0
-
Relative charge: -2 Relative mass: 0
-
Relative charge: +2 Relative mass: 4
Pregunta 18
Pregunta
Gamma radiation is uncharged and has no mass.
Respuesta
- True
- False
Pregunta 19
Pregunta
What is the range of beta radiation in air?
Respuesta
-
1 metre
-
5 metres
-
50 metres
-
5 centimetres
Pregunta 20
Pregunta
Alpha is the most ioning type of radiation.
Respuesta
- True
- False
Pregunta 21
Pregunta
Beta radiation is easily deflected by a magnetic field as it is a fast moving electron.
Respuesta
- True
- False
Pregunta 22
Pregunta
Which of these is NOT a definition of half-life?
Respuesta
-
The average weight of a certain amount of nuclei in a radioactive isotope sample after it has halved.
-
The time it takes for the activity of a sample to halve.
-
The time it takes for the count rate of a sample to halve.
-
The average time it takes for the number of nuclei in a radioactive isotope sample to halve.
Pregunta 23
Pregunta
The half-life of a particular isotope varies.
Respuesta
- True
- False
Pregunta 24
Pregunta
The half-lives of different isotopes range from seconds to many millions of years.
Respuesta
- True
- False
Pregunta 25
Pregunta
What is the half-life of Carbon-14?
Respuesta
-
5,700 years
-
570 years
-
57 years
-
5.7 years
Pregunta 26
Pregunta
What type of radiation and what length of half-life is needed for a radioactive tracer?
Respuesta
-
Gamma radiation, long half-life
-
Beta radiation, short half-life
-
Gamma radiation, short half-life
-
Alpha radiation, short half-life
Pregunta 27
Pregunta
What type of radiation and what length of half-life is needed for a smoke alarm?
Respuesta
-
Gamma radiation, short half-life
-
Beta radiation, short half-life
-
Beta radiation, long half-life
-
Alpha radiation, long half-life
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