#Where Does Gold Come From Originally Download Or Print

Gold is where you find it, so the saying goes, and gold was first discovered in its natural state, in streams all over the world.The majority of poppy seeds used for food come from the opium poppy, Papaver somniferum. Although these seeds do have opium content, the amount used for cooking.Copper was first used by man over 10,000 years ago. A copper pendant discovered in what is now northern Iraq has been dated about 8700 B.C. For nearly five millennia copper was the only metal known to man, and thus had all the metal applications.Where Did Horses Originally Come From The first species of horse arose in Asia, Europe and North America between 45 and 60 million years ago, during the period known as the Eocene. Partial fossils of this diminutive species were discovered in England in 1841 by the paleontologist Richard Owen, who referred to it as Hyracotherium, or 'mole beast.'Early copper artifacts, first decorative, then utilitarian, were undoubtedly hammered out from 'native copper,' pure copper found in conjunction with copper-bearing ores in a few places around the world.

The atomic number of each element increases by one, reading from left to right.Elements are organised into blocks by the orbital type in which the outer electrons are found. Members of a group typically have similar properties and electron configurations in their outer shell.A horizontal row in the periodic table. A vertical column in the periodic table.

The higher the value, the larger risk there is to supply.The percentage of the world reserves located in the country with the largest reserves. A higher recycling rate may reduce risk to supply.The availability of suitable substitutes for a given commodity.High = substitution not possible or very difficult.Medium = substitution is possible but there may be an economic and/or performance impactLow = substitution is possible with little or no economic and/or performance impactThe percentage of an element produced in the top producing country. This is calculated by combining the scores for crustal abundance, reserve distribution, production concentration, substitutability, recycling rate and political stability scores.The number of atoms of the element per 1 million atoms of the EarthвЂ™s crust.The percentage of a commodity which is recycled. Where more than one isotope exists, the value given is the abundance weighted average.Atoms of the same element with different numbers of neutrons.The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems.Data for this section been provided by the British Geological Survey.An integrated supply risk index from 1 (very low risk) to 10 (very high risk). This is approximately the sum of the number of protons and neutrons in the nucleus.

Where Does Gold Come From Originally Download Or Print

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Version 1.0 (2005), accessed December 2014.J. Tables of Physical & Chemical Constants, Kaye & Laby Online, 16th edition, 1995. Haynes, ed., CRC Handbook of Chemistry and Physics, CRC Press/Taylor and Francis, Boca Raton, FL, 95th Edition, Internet Version 2015, accessed December 2014.

Elements 113, 115, 117 and 118 В© Royal Society of Chemistry 2017.Created by video journalist Brady Haran working with chemists at The University of Nottingham. Periodic Table of Videos, accessed December 2014.Derived in part from material provided by the British Geological Survey В© NERC.Elements 1-112, 114, 116 and 117 В© John Emsley 2012. Cottrell, The Strengths of Chemical Bonds, Butterworth, London, 1954.John Emsley, NatureвЂ™s Building Blocks: An A-Z Guide to the Elements, Oxford University Press, New York, 2nd Edition, 2011.Thomas Jefferson National Accelerator Facility - Office of Science Education, ItвЂ™s Elemental - The Periodic Table of Elements, accessed December 2014.