Elements Crossword

a metal that reacts violently with water; its name comes from its history of being made when wood is burned in pots to make ashes
the lightest and most abundant element in the universe
the second most abundant element in the Earth's crust; is a semiconductor
makes emeralds green; also toxic and causes berylliosis
most airplane parts are made of this element for its strength and low density
so unreactive that it's found in only one compound; its mineral weakens Superman
used in film because its compounds are light-sensitive; makes up nicer knives, forks, and spoons
gas found in many screw-in light bulbs because of its low reactivity
used in jet engines and nice bicycles because it doesn't fatigue and in pins in bones because it doesn't react in the human body
you last about five minutes without it; makes up ozone
metal that makes up about 25% of our five cent pieces
the most reactive element; added to water in most U.S. cities; found in Teflon
found in blimps; a noble gas
probably forms no known compounds with any element; glows red when electricity is passed through it
gives off yellow light when burned; found in baking soda; in group 1
gave the San Francisco 49ers their name
makes an acid found in most sodas
makes rubies red and metals unreactive and shiny
silvery metal that would melt in your hand but has a boiling point of 2403 degrees C.
makes up most of U.S. pennies since 1982
one of three magnetic elements; associated with the color blue
found in all organic compounds; able to form four bonds
makes paper white and kills germs; its name means greenish-yellow
found in lime; makes water hard; makes up much of bones and seashells
the most common elment in Earth's atmosphere; very important in fertilizers
makes your blood and clay red
gave police their nickname because it was used in the buttons on their uniforms; ductile; makes brass when combined with zinc
needed by the thyroid gland; a violet-black antiseptic
smells like rotten eggs; part of acid rain
makes up bullets; toxic