https://padlet.com/johnpnalus/Chromium Made with an open mind en-us 2017-02-27 01:25:45 UTC 2026-03-01 17:49:56 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Planets.png johnpnalus https://padlet.com/johnpnalus/Chromium/wish/156296700 Chromium is a blue-white, brittle and very corrosion resistant hard metal. Named after the Greek word for colour, "chroma," it has an atomic mass of 51.9961 and an atomic number of 24. Chromium can be polished to expose a very shiny surface. It is added to steel to harden it and form stainless steel.]]> 2017-02-27 01:31:53 UTC https://padlet.com/johnpnalus/Chromium/wish/156296700 johnpnalus https://padlet.com/johnpnalus/Chromium/wish/157889215 Royal Society of Chemistry, 2017, Chromium. http://www.rsc.org/periodic-table/element/24/chromium (accessed 27th Feb 2017)

Jefferson Lab, 2017, The Element Chromium. http://education.jlab.org/itselemental/ele024.html (accessed 27th Feb 2017)

Chemistry Explained, 2016, Chromium. http://www.chemistryexplained.com/elements/A-C/Chromium.html (accessed 5th March 2017)

Lenntech, 2017, Chromium - Cr. http://www.lenntech.com/periodic/elements/cr.htm (accessed 9th March 2017)

Teach the Earth, 2016, Chromium and its negative effects on the environment. http://serc.carleton.edu/NAGTWorkshops/health/case_studies/chromium.html (accessed 9th March 2017)

]]> 2017-03-05 22:54:16 UTC https://padlet.com/johnpnalus/Chromium/wish/157889215 johnpnalus https://padlet.com/johnpnalus/Chromium/wish/157892587  In room temperature, the element is in a solid state and has a density of 7.19 grams per cubic centimetre. In order to melt Chromium you would need to put it in 1907 ^oC or above, and to boil it you would need to heat it above 2670 ^oC. ]]> 2017-03-05 23:36:15 UTC https://padlet.com/johnpnalus/Chromium/wish/157892587 johnpnalus https://padlet.com/johnpnalus/Chromium/wish/158875489 Chromium is can be found at the centre of the periodic table. In the most abundant isotope, it has 28 neutrons (in blue), 24 protons (red) and 24 electrons (green). The element has an electron structure of 2, 8, 13, 1. ]]> 2017-03-09 06:14:16 UTC https://padlet.com/johnpnalus/Chromium/wish/158875489 johnpnalus https://padlet.com/johnpnalus/Chromium/wish/158876933 Chromium was discovered by a French chemist named Louis-Nicholas Vauquelin at Paris in 1798. While experimenting with a material known as Siberian red lead that was found in an Siberian gold mine he analysed it and produced chromium oxide by mixing crocoite with hydrochloric acid.

]]> 2017-03-09 06:32:34 UTC https://padlet.com/johnpnalus/Chromium/wish/158876933 johnpnalus https://padlet.com/johnpnalus/Chromium/wish/158878102 The most abundant isotope of Chromium, ⁵²Cr,  is a stable one, therefore it does not have a half life. However, an isotope of Chromium, ⁵⁰Cr, has a half life of more than 1.3 x 10¹⁸ years. In comparison, that's 92,857,142 times the age of our universe! ]]> 2017-03-09 06:45:28 UTC https://padlet.com/johnpnalus/Chromium/wish/158878102 johnpnalus https://padlet.com/johnpnalus/Chromium/wish/158879173 ⁵²Chromium has a natural abundance of 83.8%. However, pure Chromium cannot be found as a pure metal, but can be mined as a compound with iron and oxygen. It is mined in Cuba. the Philippines, New Caledonia, Zimbawe, Albania, South Africa and Turkey. ]]> 2017-03-09 06:56:47 UTC https://padlet.com/johnpnalus/Chromium/wish/158879173 johnpnalus https://padlet.com/johnpnalus/Chromium/wish/158880418 Due to its high value on the market, human activities increase the concentrations of Chromium, especially in oceans. through its applications on the industry. High concentrations of improper disposed chromium leads to damages of fishes' gills that swim near the area. In other animals, high dosed of the element can cause respiratory problems, a lower ability to flight for birds, birth problems like infertility and tumour formation. On the other hand, normal doses of Chromium is an essential element on plants and animals. Most of the Chromium on the air will eventually settle in the water or soil. It strongly attaches to the soil particles and as a result high levels of it does not end up in groundwater.]]> 2017-03-09 07:11:49 UTC https://padlet.com/johnpnalus/Chromium/wish/158880418