"Chapter 1 Chemistry": HTML5 Crossword

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6. Automobile and coal fire electric plants are two causes of __________ pollution. (13,0)
8. Group 8A is full of _______ gases. (5)
9. _______= Intrinsic health hazard. (8,0)
10. ________ pollutants are harmful substances that form when primary pollutants react with each other or with water vapor. (9,0)
12. ______are composed of one atom. (8)

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1. Metal is a good __________ of electricity and heat. (9)
2. 78% of air is ________. (8)
3. Air is composed of 2 elements and 8________. (9)
4. PM=________Matter. (11,0)
5. Carbon ________ is the silent killer. (8)
7. What is the amount of substance encountered? (8,0)
11. The horizontal columns on the periodic table are called_________? (7)
13. Air is a _________. (7)