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Questions and Answers
What is the relative charge of a proton?
What is the relative charge of a proton?
Where is most of the mass of an atom concentrated?
Where is most of the mass of an atom concentrated?
What subatomic particle has a relative mass closest to zero?
What subatomic particle has a relative mass closest to zero?
Isotopes of an element have the same number of what particles?
Isotopes of an element have the same number of what particles?
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Which subatomic particle lies at different distances from the nucleus?
Which subatomic particle lies at different distances from the nucleus?
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What term is used to describe the fixed paths in which electrons exist around the nucleus?
What term is used to describe the fixed paths in which electrons exist around the nucleus?
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Which subatomic particle subdivided the positive charge of the nucleus and has the same amount of charge as a proton?
Which subatomic particle subdivided the positive charge of the nucleus and has the same amount of charge as a proton?
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What is the term for the rate at which a source of unstable nuclei undergoes radioactive decay?
What is the term for the rate at which a source of unstable nuclei undergoes radioactive decay?
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Which type of decay involves the emission of a helium nucleus?
Which type of decay involves the emission of a helium nucleus?
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What is the unit used to measure the rate of radioactive decay?
What is the unit used to measure the rate of radioactive decay?
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Which type of radiation is weakly penetrating and highly ionizing?
Which type of radiation is weakly penetrating and highly ionizing?
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Who discovered the electron?
Who discovered the electron?
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According to the Gold Foil Experiment, what did Rutherford realize about atoms?
According to the Gold Foil Experiment, what did Rutherford realize about atoms?
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What did Rutherford conclude from observing that most 𝛼 particles went straight through the gold foil?
What did Rutherford conclude from observing that most 𝛼 particles went straight through the gold foil?
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Which model of the atom suggested that electrons orbit the nucleus in specific energy levels?
Which model of the atom suggested that electrons orbit the nucleus in specific energy levels?
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What does the Plum Pudding Model suggest about the distribution of charges in an atom?
What does the Plum Pudding Model suggest about the distribution of charges in an atom?
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Why did Bohr propose a model where electrons orbit the nucleus instead of collapsing into it?
Why did Bohr propose a model where electrons orbit the nucleus instead of collapsing into it?
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What type of nuclear radiation is low ionising and highly penetrating?
What type of nuclear radiation is low ionising and highly penetrating?
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In alpha decay, what happens to the mass and charge of the nucleus?
In alpha decay, what happens to the mass and charge of the nucleus?
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Which type of decay does not cause the mass or charge of the nucleus to change?
Which type of decay does not cause the mass or charge of the nucleus to change?
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What is the half-life of an isotope defined as?
What is the half-life of an isotope defined as?
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What does beta decay cause in terms of the mass and charge of the nucleus?
What does beta decay cause in terms of the mass and charge of the nucleus?
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If 80 atoms fall to 20 over 10 minutes, what is the half-life?
If 80 atoms fall to 20 over 10 minutes, what is the half-life?
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What is the main difference between contamination and irradiation?
What is the main difference between contamination and irradiation?
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Which scenario best describes radioactive contamination?
Which scenario best describes radioactive contamination?
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What happens during irradiation?
What happens during irradiation?
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What is the primary hazard associated with radioactive contamination?
What is the primary hazard associated with radioactive contamination?
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Which statement best defines irradiation?
Which statement best defines irradiation?
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Why is it important to differentiate between contamination and irradiation?
Why is it important to differentiate between contamination and irradiation?
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