G12 T3 Classwork 1
10 Questions
| Total Attempts: 18
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Questions and Answers
- 1.What is a β-particle and from which part of a radioactive atom is it emitted?
- A.
Electron from the nucleus
- B.
Electron from outer orbits
- C.
Helium nucleus from the nucleus
- D.
Helium nucleus from outer orbits
- 2.A radioactive nucleus contains 138 neutrons. The nucleus emits an α-particle.How many neutrons are in the nucleus after it has emitted the α-particle?
- 3.
An atom of the element lithium has a nucleon number of 7 and a proton number of 3.Which diagram represents a neutral atom of lithium?- A.
Diagram A
- B.
Diagram B
- C.
Diagram C
- D.
Diagram D
- 4.
How many protons are there in a neutral atom of
- 5.Which type of radiation has the greatest ionising effect?
- A.
α-particles
- B.
β-particles
- C.
γ-rays
- D.
All have the same ionising effect
- 6.
The diagram shows the paths of three different types of radiation, X, Y and Z.
- A.
A
- B.
B
- C.
C
- D.
D
- 7.A powder contains 400mg of a radioactive material that emits α-particles.The half-life of the material is 5 days. What mass of that material remains after 10 days?
- 8.A radioactive nucleus contains 138 nucleons. The nucleus emits an α-particle.How many nucleons are in the nucleus after it has emitted the α-particle?
- 9.
How many electrons are in a nucleus of if the atom is neutral?
Questions: 20 | Attempts: 390 | Last updated: Mar 21, 2022
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Sample QuestionTwo faulty ammeters and two perfect ammeters are connected in series in the circuit shown.The readings on the ammeters are:A1 2.9 AA2 3.1 AA3 3.1 AA4 3.3 AWhich two ammeters are faulty?
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