30 most important by Dylan Miller https://padlet.com/3026301/8xzaf9gtbij2 Made with charm en-us 2017-04-25 20:35:01 UTC 2025-12-14 09:48:09 UTC hello@padlet.com helium 2 He 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168233210 helium is used in balloons

 ]]> 2017-04-25 20:36:14 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168233210 Lithium 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168235134 3 Li

lithium is made of rocks ]]> 2017-04-25 20:49:00 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168235134 13 al Aluminium 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168236804 2017-04-25 20:59:01 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168236804 Antimony 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168237145 sb
]]> 2017-04-25 21:01:21 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168237145 Actinium 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168237491 89 Ac
]]> 2017-04-25 21:03:27 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168237491 79 Au 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168238001 2017-04-25 21:06:45 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168238001 Caesium: the essentials 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168238416 2017-04-25 21:09:52 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168238416 Zirconium 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168500726 40 Zr
Zirconium is a greyish-white lustrous metal. The finely divided metal can ignite spontaneously in air, especially at elevated temperatures. The solid metal is much more difficult to ignite. The inherent toxicity of zirconium compounds is low. Hafnium is invariably found in zirconium ores, and the separation is difficult. Commercial grade zirconium contains from 1 to 3% hafnium. The hafnium is removed from the zirconium used in the nuclear power industry.


 
]]> 2017-04-26 20:52:10 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168500726 Silicon: the essentials 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168501062 Silicon is present in the sun and stars and is a principal component of a class of meteorites known as aerolites. Silicon makes up 25.7% of the earth's crust by weight, and is the second most abundant element, exceeded only by oxygen. It is found largely as silicon oxides such as sand (silica), quartz, rock crystal, amethyst, agate, flint, jasper and opal. Silicon is found also in minerals such as asbestos, feldspar, clay and mica.]]> 2017-04-26 20:54:57 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168501062 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168501411 Strontium does not occur as the free element. Strontium is softer than calcium and decomposes water more vigorously. Freshly cut strontium has a silvery appearance, but rapidly turns a yellowish colour with the formation of]]> 2017-04-26 20:58:00 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168501411 Neodymium 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168501665 60 Nd
Neodymium is present in misch metal to the extent of about 18%. The metal has a bright silvery metallic lustre. Neodymium is one of the more reactive rare-earth metals and quickly tarnishes in air, forming an oxide that spa]]> 2017-04-26 20:59:58 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168501665 Neon 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168502401 Neon is a very inert element. Neon forms an unstable hydrate. In a vacuum discharge tube, neon glows reddish orange. Of all the rare gases, the discharge of neon is the most intense at ordinary voltages and currents. It is present in the atmosphere as 1 part in 65000.

]]> 2017-04-26 21:06:27 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168502401 Terbium 3026301 https://padlet.com/3026301/8xzaf9gtbij2/wish/168502627 65 Tb0]]> 2017-04-26 21:08:34 UTC https://padlet.com/3026301/8xzaf9gtbij2/wish/168502627