https://padlet.com/obney_tyler/926n723n8dve7fyg en-us 2023-02-01 18:08:09 UTC 2023-02-03 16:09:25 UTC hello@padlet.com obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2465016663 Leucippus of Miletus is believed to have invented atomic philosophy. 

One of his disciples- Democritus created the name for the building blocks of matter naming them Atomos]]> 2023-02-01 18:10:56 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2465016663 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2465021664 Aristotle didn't support atomic theory- he believed everything on earth was made of a combination of earth, water, fire, and air.]]> 2023-02-01 18:14:01 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2465021664 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2466572793 John Dalton is credited with introducing atomic theory into chemistry.

Atomic theory-All matter is composed of extremely small particles called atoms. Atoms of a given element are identical in size, mass, and other properties. Atoms of different elements differ in size, mass, and other properties. Atoms cannot be subdivided, created, or destroyed.]]> 2023-02-02 18:18:00 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2466572793 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467746461 Cathode ray- A cathode ray is a beam of electrons observed in discharge tubes. 

JJ Thomson conducted experiments with cathode rays in order to discover the existence of the electron.

]]> 2023-02-03 15:38:24 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467746461 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467751042 After discovering the electron JJ Thomson proposed a model of the atom in which negative electrons are scattered throughout a sphere of positive charge.]]> 2023-02-03 15:41:40 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467751042 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467757239 Ernest Rutherford conducted an experiment in which He shot a beam of alpha particles at a gold foil. He observed that some of the particles were reflected back. He hypothesized the existence of a dense mass in the middle of the atom called the nucleus.]]> 2023-02-03 15:45:58 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467757239 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467761608 After Rutherford conducted his gold foil experiment and discovered the nucleus, he created this model of the atom which differs from the previous plum pudding model]]> 2023-02-03 15:49:21 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467761608 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467773340 A physicist named James Chadwick discovered the Existence of the neutron. 
In order to make these discoveries he bombarded Beryllium with alpha particles from the natural radioactive decay of polonium. The resulting radiation showed high penetration through a lead shield, which could not be explained by particles at the time. These results were interpreted into the existence of a particle with mass of a neutral charge.]]> 2023-02-03 15:58:35 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467773340 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467776946 Eugene goldstein used a tube similar to Thomsons tube filled with hydrogen in order to discover a particle of positive charge]]> 2023-02-03 16:01:26 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467776946 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467782333 Neils Bohr was a Danish physicist who made foundational discoveries in understanding the atom and quantum theory. After observing how glowing hot hydrogen gives off light, he developed Bohr's model of the atom.]]> 2023-02-03 16:05:21 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467782333 obney_tyler https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467787387 The quantum mechanical model of the atom was proposed by Erwin Schrodinger. This model of the atom treats electrons as matter waves. This model allows for the description of the position of the electron on a three-dimensional plane.]]> 2023-02-03 16:09:14 UTC https://padlet.com/obney_tyler/926n723n8dve7fyg/wish/2467787387