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"Periodic Table, Molecules, and More!": HTML5 Crossword

Across

3. What is the name of the element that the "seven" rule does not apply to when remembering the diatomic elements? (8)
4. What AQI color is used for "unhealthy for sensitive groups"air quality? (6)
7. On the periodic table what way increases metallic characteristics? (4)
8. What is the chemical name for this structual formula: CH3(CH2)CH3? (7)
11. What is the term that is use when a pollutant is from human activity? (13)
12. What is the majority of the periodic table made of? (6)

Down

1. What is another term for group? (8,6)
2. True or False. Drop "a" at the end of a prefix for oxygen. (4,0)
5. What is the chemical name of C9H20? (6)
6. What element is in group 7 period 5? (10)
9. Define: Intrinsic health hazard. (8)
10. What rule should you use to remember diatomic elements? (5)

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