https://padlet.com/breb053/txrr7fc6chg3 Brendan Ebenhack Olivia Fuson en-us 2019-10-21 20:23:08 UTC 2026-02-16 20:41:52 UTC hello@padlet.com https://padlet-uploads.storage.googleapis.com/422337944/a6d060adb94099df19f85fc63cfa091a/media.jpeg breb053 https://padlet.com/breb053/txrr7fc6chg3/wish/400560085 7 horizontal columns on the periodic table of elements to order things such as the reactivity of the elements. ]]> 2019-10-21 20:28:59 UTC https://padlet.com/breb053/txrr7fc6chg3/wish/400560085 breb053 https://padlet.com/breb053/txrr7fc6chg3/wish/400560269 2019-10-21 20:29:24 UTC https://padlet.com/breb053/txrr7fc6chg3/wish/400560269 olfu656 https://padlet.com/breb053/txrr7fc6chg3/wish/401120294 2019-10-22 19:56:49 UTC https://padlet.com/breb053/txrr7fc6chg3/wish/401120294 breb053 https://padlet.com/breb053/txrr7fc6chg3/wish/401152774 Russian chemist Dimitri Mendeleev created the periodic table in 1869 by arranging chemical elements by atomic mass. He predicted that there were many more to be elements to be found in the future, he even left blank spaces for were they would need to go. Most, if not everything that Dimitri has predicted has come to be, as many recently discovered elements turned out to fit right in those holes.]]> 2019-10-22 21:13:32 UTC https://padlet.com/breb053/txrr7fc6chg3/wish/401152774 breb053 https://padlet.com/breb053/txrr7fc6chg3/wish/401154953 2019-10-22 21:19:57 UTC https://padlet.com/breb053/txrr7fc6chg3/wish/401154953 olfu656 https://padlet.com/breb053/txrr7fc6chg3/wish/401728201 The properties of elements Change with a pattern. Starting from the left, you have reactive metals. Further down you have relatively unreactive metals. further to the right, there are metalloids. Finally on the far right, there are non reactive gases.]]> 2019-10-23 20:47:58 UTC https://padlet.com/breb053/txrr7fc6chg3/wish/401728201