#C element periodic table license
The RSC has been granted the sole and exclusive right and licence to produce, publish and further license the Images. This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site.Ĭopyright of and ownership in the Images reside with Murray Robertson. Welcome to "A Visual Interpretation of The Table of Elements", the most striking version of the periodic table on the web. Images © Murray Robertson 1999-2011 Text © The Royal Society of Chemistry 1999-2011 Arsenic levels appear to be lower in shallower, ground water or in much deeper aquifers and this knowledge should hopefully contribute to reducing the risks in future. The World Health Organization report that arsenic in drinking water could end up causing between 200,000 to 270,000 deaths in Bangladesh from cancer.
#C element periodic table skin
After about 10 years drinking that water symptoms extend to skin and internal cancers. The first symptoms found in people drinking arsenic contaminated water include pigmentation changes in the skin and skin thickening or hyperkeratosis. By 1993 it was discovered that arsenic was present in these wells. Well digging saw a marked decrease in water borne infections. But about 30 years ago they started getting water from wells. Local populations used to get their drinking water from open sources like ponds. There's a particular problem in Bangladesh, rising arsenic levels there followed what was supposed to be an improvement to the water supply. Arsenic levels in ground water are sometimes elevated as a result of erosion from local rocks. The reappearance of garlic is coincidental and the type of poisoning, acute deliberate poisoning versus unintentional long term poisoning by drinking water is very different. Political stability of top reserve holderĪ percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators. The higher the value, the larger risk there is to supply.Ī percentile rank for the political stability of the top producing country, derived from World Bank governance indicators. The percentage of the world reserves located in the country with the largest reserves. The higher the value, the larger risk there is to supply. The percentage of an element produced in the top producing country. Low = substitution is possible with little or no economic and/or performance impact Medium = substitution is possible but there may be an economic and/or performance impact
High = substitution not possible or very difficult. The availability of suitable substitutes for a given commodity. A higher recycling rate may reduce risk to supply. The percentage of a commodity which is recycled. The number of atoms of the element per 1 million atoms of the Earth’s crust. This is calculated by combining the scores for crustal abundance, reserve distribution, production concentration, substitutability, recycling rate and political stability scores. 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.ĭata for this section been provided by the British Geological Survey.Īn integrated supply risk index from 1 (very low risk) to 10 (very high risk). Where more than one isotope exists, the value given is the abundance weighted average.Ītoms of the same element with different numbers of neutrons. This is approximately the sum of the number of protons and neutrons in the nucleus. The mass of an atom relative to that of carbon-12. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase.ĭensity is the mass of a substance that would fill 1 cm 3 at room temperature.
The temperature at which the liquid–gas phase change occurs. The temperature at which the solid–liquid phase change occurs. The arrangements of electrons above the last (closed shell) noble gas.
These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). The atomic number of each element increases by one, reading from left to right.Įlements 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.Ī horizontal row in the periodic table.
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