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Checking Two Sources of an Emitted Electron 4 questions
Checking Two Sources of an Emitted Electron
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A model starts with a neutral atom containing six protons, eight neutrons, and six bound electrons. In trial P it removes one bound electron. In trial Q a neutron changes into a proton and emits a beta-minus electron. No bound electron leaves in Q. The detector records one negative particle leaving the atom in each trial.
| After the event | Protons | Neutrons | Bound electrons |
|---|---|---|---|
| P | 6 | 8 | 5 |
| Q | 7 | 7 | 6 |
Question 1
Which record shows that a nuclear change occurred?
- P only
- Q only
- Both
- Neither
Question 2
Calculate the mass number and the net charge of the remaining atom or ion in each trial.
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Question 3
A student says matching remaining mass numbers and charges prove both electrons came from the same part of the atom. Evaluate the claim with the counts.
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The display now gives each remaining ion one electron to make it neutral.
Question 4
Explain whether the two neutral atoms now have the same identity. Use their proton counts.
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