Which of the following are noble gases? Select all that apply.

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* 1. Which of the following are noble gases? Select all that apply.

What is the atomic number of Calcium?

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* 2. What is the atomic number of Calcium?

The element with atomic number 29 is…

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* 3. The element with atomic number 29 is…

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

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

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

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

Elements are arranged _____ into “periods.”

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* 6. Elements are arranged _____ into “periods.”

The majority of the elements in the periodic table are…

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

How many elements are in the modern periodic table?

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

The atomic number counts the number of what?

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* 9. The atomic number counts the number of what?

What are isotopes?

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* 10. What are isotopes?

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