https://padlet.com/2109111/wcigx8wvd0v2 en-us 2016-11-10 15:10:45 UTC 2026-01-23 15:27:25 UTC hello@padlet.com 2109111 https://padlet.com/2109111/wcigx8wvd0v2/wish/136756646 In 1913 Niels Bohr created the Bohr model to show how electrons orbit around a nucleus indefinitely.]]> 2016-11-10 15:19:01 UTC https://padlet.com/2109111/wcigx8wvd0v2/wish/136756646 2109111 https://padlet.com/2109111/wcigx8wvd0v2/wish/137016446 This model is based off of wave quantum mechanics. It was discovered that electrons do not move in a definite path around the atom.   http://bit.ly/2fIcTuZ]]> 2016-11-11 14:52:19 UTC https://padlet.com/2109111/wcigx8wvd0v2/wish/137016446 2109111 https://padlet.com/2109111/wcigx8wvd0v2/wish/137019396 Rutherford shot Alpha particles at a sheet of gold foil. Most when right through the foil yet some were deflected. He concluded that atoms form a net, most atoms can get through but some are deflected.]]> 2016-11-11 15:02:48 UTC https://padlet.com/2109111/wcigx8wvd0v2/wish/137019396 2109111 https://padlet.com/2109111/wcigx8wvd0v2/wish/137021081 In 1778 Lavoisier heated mercury oxide. He noticed that its weight decreased, but when he measured the weight of oxygen released, the two weights equaled the original mass of mercury oxide. He discovered the Conservation of Mass.
http://bit.ly/2eJX2ev]]> 2016-11-11 15:07:41 UTC https://padlet.com/2109111/wcigx8wvd0v2/wish/137021081 204011 https://padlet.com/2109111/wcigx8wvd0v2/wish/137253937 Around 400 B.C Democritus said that everything is made up of atoms/ small particles that can not be split or divided. To bring that all together he basically was the start to everything and the study of the atom. Aristotle was the one who brought the science into Democritus thought.
http://www.ph.surrey.ac.uk/partphys/chapter1/EarlyHistory.html]]> 2016-11-14 02:29:30 UTC https://padlet.com/2109111/wcigx8wvd0v2/wish/137253937 204011 https://padlet.com/2109111/wcigx8wvd0v2/wish/137255227 Dalton was a scientist in 1903 AD. Dalton was the one who created the atomic theory of matter. Which included
 "1. Elements are composted of small particles called atoms.
2. All atoms of a given element are identical.
3. Atoms are neither created nor destroyed in chemical reactions.
4. Compounds always contain the same proportion of elements"
http://hi.fi.tripod.com/timeline/.]]> 2016-11-14 02:45:11 UTC https://padlet.com/2109111/wcigx8wvd0v2/wish/137255227 204011 https://padlet.com/2109111/wcigx8wvd0v2/wish/137255256 J.J Thomson was a scientist from 1889 AD. He was the first to discover the negatively charged electron. He also created the Plum Pudding model of an atom. http://hi.fi.tripod.com/timeline/]]> 2016-11-14 02:45:42 UTC https://padlet.com/2109111/wcigx8wvd0v2/wish/137255256 204011 https://padlet.com/2109111/wcigx8wvd0v2/wish/137257995 Short clip to see his experiment (CRT).]]> 2016-11-14 03:20:29 UTC https://padlet.com/2109111/wcigx8wvd0v2/wish/137257995