"Chemistry and Society Crossword": HTML5 Crossword

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3. What is the common name for the chemical family 8A? (5,3)
6. What is a substance that is made of entirely from one type of atom? (7)
11. Which gas is known as the "silent killer"? (6,8)
12. What is the last element in group 8B? (6)
13. What is the last element in period 5? (5)
14. Most elements are? (6)

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1. What AQI color is used for "very unhealthy"? (6)
2. Is Sulfur a Metal, Metalloid, or a Nonmetal? (8)
4. What does AQI stand for? (3,7,5)
5. Is thallium a metal, nonmetal, or metalloid? (5)
7. Is He an element or compound? (7)
8. What is silicon's atomic number? (8)
9. What level of the atmosphere has the "bad ozone"? (11)
10. Is NaCl a element, compound, or mixture? (8)