Atomic Structure
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Question 1 of 5
1. Question
In the photoelectric effect, high-energy photons knock electrons off a neutral metal surface. If the metal loses electrons at a rate of 10,000 e⁻/s, what will its charge be after 5 seconds?
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Question 2 of 5
2. Question
The nucleus of an atom seems like it shouldn’t be able to hold together. Why is that? What must be true for nuclei to exist?
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This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted.Hint
like charges repel, opposite charges attract
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Question 3 of 5
3. Question
An atom has an atomic mass of 31 and 18 neutrons. Which of the following is the atom?
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Question 4 of 5
4. Question
In alpha decay, the nucleus of an atom releases an alpha particle—a helium (He) nucleus. If Rb undergoes alpha decay, what element would it become?
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This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
Grading can be reviewed and adjusted.Grading can be reviewed and adjusted.Hint
How do the protons change in alpha decay?
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Question 5 of 5
5. Question
Which of the following represents an atom with 19 protons and 17 electrons?
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