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1. Which of the following are noble gases? Select all that apply. (Required.)

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2. What is the atomic number of Calcium?

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3. The element with atomic number 29 is…

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4. Which of the following are NOT solid at room temperature? Select all that apply. (Required.)

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5. “Groups” or “families” have similar atomic structure and are arranged _____ in the table.

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6. Elements are arranged _____ into “periods.”

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7. The majority of the elements in the periodic table are…

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8. How many elements are in the modern periodic table?

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9. The atomic number counts the number of what?

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10. What are isotopes?

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