The Comparative Abundance Of The Elements :: essays research papers

The Comparative Abundance of The Elements- There be 92 naturally occurring elements, nevertheless 17 of them make up 99.5% ofthe earths sauciness (including oceans and atm). - In living leangs (plants,animals, people) the sestet both(prenominal) abundant elements ar carbon, hydrogen, oxygen,nitrogen, match and sulfur. - The universe is dominated by the elementshydrogen (83%) and helium (16%)1. The CrustThe outside of the earth is a thin crust which is approximately 20 to 40kmthick. The crust is a formation of dips and hollows which atomic number 18 filled with waterto form the oceans and seas. On top of the earths crust is an atmosphere, thisis a thin layer of gases, 95% of these gases are within the first 20km of theearths surface. Of the 17 elements that make up 99.5%, the most abundant ofthese are Oxygen 49.2%, ti 25%, and Aluminum 7.5%. Then the next mostabundant elements are Iron 4.7%, Calcium 3.4%, Sodium 2.6%, Potassium 2.4%,Magnesium 1.9%, Hydrogen 0.9%, te 0.6% , Chlorine 0.2%, PhosphorusManganese and Carbon are all 0.1%, sulfur 0.05% Barium 0.04%, Nitrogen 0.03% andthe rest of the elements on the periodic table recurrence up about 0.5%.The elements of the crust are graphed below, but only matchlesss that are themost abundant due to the fact that the abundance of the other elements of thecrust are too low to graph accurately on one graph.Almost all elements are found as compounds, however Oxygen, Nitrogen,and to a lesser extent sulfur, gold, silver and platinum are the only elementswhich send word be found in almost there raw sate. The atmosphere bes Oxygen andnitrogen, but it only contains a small portion of the earths oxygen, this isbecause most of the worlds oxygen is found in water, oxides of metals, and assilicates. Common soils and clays are silicates.2. financial support ThingsIn living things (plants, animals, people) the six most abundant elementsare carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfur (known as CHONPS) .Most compounds in living matter are radically complex, each molecule couldcontain hundreds or thousands of atoms. Carbohydrates and fats are compoundswhich contain carbon, hydrogen and oxygen only. Proteins are also compounds andthey contain nitrogen, sulfur and occasionally phosphorus. Living matter cannotlive on these six elements alone so far though they make up 99% of the mass, theyalso need some compounds of other elements such as calcium, potassium, sodium,