Chemistry in Everyday Life! Crossword Puzzle

QUESTIONS LIST: crystal : a diamond is the hardest known substance in the world because of its _ structure, helium : hydrogen is the most abundant element in the universe. what is the 2nd? (it also starts with letter h), carbon dioxide : this chemical compound is found in fire extinguishers, dry ice and the gas that humans exhale (2 words), plasma : solid, liquid, gas are the 3 states of matter. what is the 4th? (it starts with a p), acid : this substance in the human stomach can even dissolve a razor blade, copper : this element is used in blue & green fireworks (the chemical symbol is cu)), carbon : allotropes are different forms of the same element. this element can be found in coal, a pencil or a diamond ring, sulfur : onions can make your eyes water & burn from this element that combines with the water in your eyes to make sulfuric acid, zinc : in 1982, pennies changed. pennies are now 97.5% copper and 2.5% of this cheap silver metal. (starts with a z), nitrogen : oxygen and this gas element make up 99% of air