
Exploring Radiation and Decay Processes
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Hard
John Larkin
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a type of ionising radiation?
Alpha
Beta
Gamma
Infrared
Answer explanation
Infrared is not a type of ionising radiation. Ionising radiation includes alpha, beta, and gamma rays, which have enough energy to remove tightly bound electrons from atoms.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main difference between alpha and beta decay?
Alpha decay emits electrons, beta decay emits helium nuclei
Alpha decay emits helium nuclei, beta decay emits electrons or positrons
Both emit the same particles
Beta decay emits protons, alpha decay emits neutrons
Answer explanation
The correct choice states that alpha decay emits helium nuclei, while beta decay emits electrons or positrons. This distinction is crucial in understanding the types of radiation produced during these decay processes.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the half-life of a radioactive substance?
The time it takes for all atoms to decay
The time it takes for half the atoms to decay
The time it takes for the substance to become non-radioactive
The time it takes for the temperature to halve
Answer explanation
The half-life of a radioactive substance is defined as the time it takes for half the atoms to decay. This means that after one half-life, only half of the original amount of the substance remains.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following particles has the greatest mass?
Alpha particle
Beta particle
Gamma ray
Neutrino
Answer explanation
The alpha particle, consisting of 2 protons and 2 neutrons, has a greater mass than the beta particle (an electron), gamma ray (a photon), and neutrino (very light particle). Thus, the alpha particle has the greatest mass.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of radiation is most easily stopped by a sheet of paper?
Alpha
Beta
Gamma
X-ray
Answer explanation
Alpha radiation consists of heavy particles that can be easily stopped by a sheet of paper, making it the least penetrating type of radiation compared to beta, gamma, and X-ray radiation.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A proton
An electron
A neutron
A positron
Answer explanation
During beta minus (\beta^-) decay, a neutron in the nucleus transforms into a proton, emitting an electron and an antineutrino. Therefore, the correct answer is 'An electron', which is emitted in this process.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a property of gamma rays?
They have mass
They are highly ionising
They are electromagnetic waves
They are stopped by paper
Answer explanation
Gamma rays are a form of electromagnetic radiation, meaning they are waves of energy without mass. They are not highly ionising compared to alpha and beta particles, and they can penetrate materials much more than paper.
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