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