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(1 point)
How does the atomic number of an element relate to its atomic structure?
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(1 point)
How does the period that an element is in relate to its atomic structure?
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(1 point)
How does the group that an element is in relate to its atomic structure (for main group elements)?
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(3 points)
Explain why sodium is not found as a pure metal in nature. Suggest a substance in which it is commonly found.
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(3 points)
Identify three examples of naturally occurring elements that are radioactive.
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(3 points)
Identify three examples of synthetic elements.
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(3 points)
Suggest why many historically important paper documents are stored in sealed containers containing argon gas. Suggest another gas that could also be used.
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(3 points)
Describe the trend in melting points going across a period.
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