2. P o w e r p o i n t 2 0 1 0

3.  Gold has been widely used throughout the world GGold is one of the worlds most precious metals  Gold is the most malleable and ductile of all metals; a single gram can be beaten into a sheet of 1 square meter, or an ounce into 300 square feet.

4. Silver It has the highest electrical conductivity of all metals.electrical conductivity metals is a metallic chemical element with the chemical symbol Agchemical element chemical symbol Most silver is produced as a byproduct of copper, gold, lead, and zinc refining. coppergoldleadzincrefining

5. Oxygen is the element with atomic number 8 and represented by the symbol O.elementatomic number a very pale blue, odorless, tasteless diatomic gas with the formula O 2.diatomic gas Oxygen is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic elementchalcogengroupperiodic tablereactive nonmetallic

6. Zinc The element was probably named by the alchemist ParacelsusParacelsus it has the symbol Zn and atomic number 30.atomic number Various isolated examples of the use of impure zinc in ancient times have been discovered

7. was discovered in 1898 brilliant red color is the chemical element that has the symbol Ne and an atomic number of 10. chemical elementatomic number

8. Uranium is a silvery-white metallic chemical element in the actinide series of the periodic table, with atomic number 92. It is assigned the chemical symbol U. Ametallicchemical elementactinide periodic tableatomic numberchemical symbol In nature, uranium is found as uranium-238 (99.2742%), uranium-235 (0.7204%), In nature It occurs naturally in low concentrations

9. Potassium bananasbananas The USDA lists tomato paste, orange juice, beet greens, white beans, potatoes, bananas and many other good dietary sources of potassiumUSDAtomato paste orange juicebeet greenswhite beanspotatoes bananas Potassium ions are an essential component of plant nutrition and are found in most soil typesplantsoil is the chemical element with the symbol Kchemical element

10. Hydrogen The most common isotope of hydrogen is protiumisotopeprotium is the chemical element with atomic number 1.chemical elementatomic number was first artificially produced in the early 16th century

11. Carbon is the chemical element with symbol C and atomic number 6.chemical elementatomic number best known are graphite, diamond, and amorphous carbongraphite diamondamorphous carbon Diamond is among the hardest materials known

12. Chromium is a chemical element which has the symbol Cr and atomic number 24chemical elementatomic number It is the first element in Group 6.Group 6 It is also odorless, tasteless, and malleable

13. Aluminum It has the symbol Al its atomic number is 13atomic number aluminum salts are not known to be used by any form of life.

14. Copper is a chemical element with the symbol Cu is a chemical element with the symbol Cuchemical elementchemical element The metal and its alloys have been used for thousands of years The metal and its alloys have been used for thousands of yearsits alloysits alloys Copper, silver and gold are in group 11 of the periodic table, and they share certain attributes Copper, silver and gold are in group 11 of the periodic table, and they share certain attributes group 11 group 11

15. Nitrogen  is a chemical element that has the symbol N, atomic number of 7 and atomic mass 14.00674 uchemical element atomic numberatomic massu  Nitrogen occurs in all living organisms  Many industrially important compounds, such as ammonia, nitric acid, organic nitratesammonianitric acid

16. Helium  is the chemical element with atomic number 2chemical elementatomic number  it is the second most abundant element in the universe and accounts for 24% of the elemental mass of our galaxyabundant element  helium was observed on August 18, 1868

17.  Lithium-6 is valued as a source material for tritium production and as a neutron absorber in nuclear fusiontritiumneutron absorbernuclear fusion  is a soft, silver-white metal that belongs to the alkali metal group of chemical elements.metalalkali metalchemical elements  lithium are present in all organisms