https://padlet.com/3013041/lgejol45g204 this thing is dumb en-us 2017-05-05 18:25:41 UTC 2023-05-30 15:52:02 UTC hello@padlet.com 3013041 https://padlet.com/3013041/lgejol45g204/wish/170252326 Actinium is dangerously radioactive. The chemical behaviour of actinium is similar to that of the rare earths, particularly lanthanum.]]> 2017-05-05 18:27:30 UTC https://padlet.com/3013041/lgejol45g204/wish/170252326 3013041 https://padlet.com/3013041/lgejol45g204/wish/170252794 Pure aluminium is a silvery-white metal with many desirable characteristics. It is light, nontoxic (as the metal), nonmagnetic and non sparking. It is somewhat decorative. It is easily formed, machined, and cast. ]]> 2017-05-05 18:29:57 UTC https://padlet.com/3013041/lgejol45g204/wish/170252794 3013041 https://padlet.com/3013041/lgejol45g204/wish/170253174 The lustre of freshly prepared americium metal is whiter and more silvery than plutonium or neptunium prepared in the same manner. Americium is a component of the smoke detector above.

]]> 2017-05-05 18:31:45 UTC https://padlet.com/3013041/lgejol45g204/wish/170253174 3013041 https://padlet.com/3013041/lgejol45g204/wish/170253470 Argon is a colourless and odourless gas present to a very small extent in the atmosphere. Argon is very inert (indeed it is referred to as one of the noble gases) and is not known to form true chemical compounds.]]> 2017-05-05 18:33:10 UTC https://padlet.com/3013041/lgejol45g204/wish/170253470 3013041 https://padlet.com/3013041/lgejol45g204/wish/170253722 2017-05-05 18:34:24 UTC https://padlet.com/3013041/lgejol45g204/wish/170253722 3013041 https://padlet.com/3013041/lgejol45g204/wish/170253740 Elemental arsenic occurs in two solid modifications: yellow, and grey or metallic, with specific gravities of 1.97, and 5.73, respectively. ]]> 2017-05-05 18:34:30 UTC https://padlet.com/3013041/lgejol45g204/wish/170253740 3013041 https://padlet.com/3013041/lgejol45g204/wish/170253968 The longest-lived isotope, ²¹⁰At, has a half-life of only 8.3 hours. There are about 20 isotopes known, all of which are radioactive. Astatine is a halogen and possibly accumulates in the thyroid like iodine.]]> 2017-05-05 18:35:56 UTC https://padlet.com/3013041/lgejol45g204/wish/170253968 3013041 https://padlet.com/3013041/lgejol45g204/wish/170254276 Barium is a metallic element, soft, and when pure is silvery white like lead. The metal oxidises very easily and it reacts with water or alcohol.]]> 2017-05-05 18:37:35 UTC https://padlet.com/3013041/lgejol45g204/wish/170254276 3013041 https://padlet.com/3013041/lgejol45g204/wish/170254577 Berkelium is a radioactive rare earth metal, named after the University of California at Berkeley (USA). Apparently, ]]> 2017-05-05 18:39:08 UTC https://padlet.com/3013041/lgejol45g204/wish/170254577 3013041 https://padlet.com/3013041/lgejol45g204/wish/170254959 Bismuth is a white, crystalline, brittle metal with a pinkish tinge. Bismuth is the most diamagnetic of all metals, and the thermal conductivity is lower than any metal, except mercury. ]]> 2017-05-05 18:41:17 UTC https://padlet.com/3013041/lgejol45g204/wish/170254959