Uses of Some of the Elements: Choose your answers for the following questions from the following list of elements. The number next to the element indicates if it is used more than once. Start with ones that you know, then use the poster in the back of the room to help. Type answers in BLUE BOLD FONT. Word Bank
Aluminum Arsenic Calcium Carbon Chlorine Chromium Copper Fluorine Hydrogen Iodine Iron(2) Lead Magnesium Mercury Neon Sulfur Tungsten Uranium

1. Needed for strong bones and teeth
2. Added to toothpaste and city water systems to help tooth decay?
3. Used to disinfect swimming pools
4. Used to “paint” the skin to prevent infection from cuts and scratches.
5. Used in bright, flashing advertising signs
6. Element that is rolled into a foil found and used in your kitchen
7. Found in the U. S. penny
8. liquid metal that used to be used in thermometers
9. Used for the shiny trim on cars
10. Steel is formed when a little bit of carbon is added to this element.
11. A diamond and your pencil lead (graphite) are made of this
12. A yellow element stinks when burned
13. Found in liver and red blood cells and is needed to prevent anemia
14. Used in light bulbs as a filament
15. Used as rat poison and is found in the title of the murder mystery “ and Old Lace”
16. Used as a shield to protect people from radioactive substances
17. Elements Used to make the first atomic bombs
18. Used in flares because it burns with a bright, white light

explanation:

the largest database of organic compounds lists about 10 million substances, which include compounds originating from living organisms and those synthesized by chemists. the number of potential organic compounds has been estimated at 1060—an astronomically high number. the existence of so many organic molecules is a consequence of the ability of carbon atoms to form up to four strong bonds to other carbon atoms, resulting in chains and rings of many different sizes, shapes, and complexities. the simplest organic compounds contain only the elements carbon and hydrogen, and are called hydrocarbons. even though they are composed of only two types of atoms, there is a wide variety of hydrocarbons because they may consist of varying lengths of chains, branched chains, and rings of carbon atoms, or combinations of these structures. in addition, hydrocarbons may differ in the types of carbon-carbon bonds present in their molecules. many hydrocarbons are found in plants, animals, and their fossils; other hydrocarbons have been prepared in the laboratory. we use hydrocarbons every day, mainly as fuels, such as natural gas, acetylene, propane, butane, and the principal components of gasoline, diesel fuel, and heating oil. the familiar plastics polyethylene, polypropylene, and polystyrene are also hydrocarbons. we can distinguish several types of hydrocarbons by differences in the bonding between carbon atoms. this leads to differences in geometries and in the hybridization of the carbon orbitals.