My 4 elements!

Argon was discovered by Sir William Ramsay, a Scottish chemist, and Lord Rayleigh, an english chemist, in 1894. Argon makes up .93% of the Earth's atmoshpere, making it the third most abundant gas. It is obtained from the air as the byproduct of the production of oxygen and nitrogen.

 

Silver- People have been using silver for 5000 years. The discoverer of Silver is unknown. It can be obtained by pure deposits, fromn silver ores, and in conjuction with deposits of ores containing lead, gold, or copper

 

Gold- It has been know for atleast 5500 years. It is found free in nature but it is usaually found in conjuction with silver, quratz, calcite, lead, tellurium, zinc, or copper. It is the most malleabl and ductile of all the elemnts. Pure gold is soft.

 

Sodium- It is the sixth most abundunt element in the world. It comprises 2.6% of the Earth's crust. It is never found free in nature. Pure sodium was first isolated by Sir Humphry Davy in 1807 through the electrolysis of caustic sodium.

Gases used in Neon

When an electric current is appliedto a neon light tube the atoms belonging to the gas are knocked out of orbit and start colliding. When they collide, the release energy which results in color. Mixing gasses and elements added to a neon light creates diffrent hues.

Carbon-14 Dating and Half-life

Carbon-14 dating is a method of obtaining age estimates on organice materials. It does not work on inorgainc materials because in organic means non carbon containing. This was developed by Willard F. Libby. The half-life of a carbon 14 atom is 5,730 years. By looking at the ratio of carbon 12 to carbon 14 in the sample and comparing it to the ratio in a living organism, it is possible to determine the age of a formely living thing.