https://padlet.com/cuccohannahr/y1qh3nwhppcz Hannah Cucco en-us 2018-10-04 12:12:47 UTC 2025-12-03 01:32:47 UTC hello@padlet.com cuccohannahr https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289077950 Ancient Greek pre-Socratic philosopher primarily remembered today for his formulation of an atomic theory of the universe. His theory is "everything is composed of "atoms", which are physically, but not geometrically, indivisible; that between atoms, there lies empty space; that atoms are indestructible, and have always been and always will be in motion; that there is an infinite number of atoms and of kinds of atoms, which differ in shape and size". This theory was discovered around 400 B.C. in Greek.]]> 2018-10-04 12:16:31 UTC https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289077950 cuccohannahr https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289086025 He designed an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure in Manchester, 1911.]]> 2018-10-04 12:32:16 UTC https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289086025 cuccohannahr https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289559495 In the first years of his career, Schrodinger became acquainted with the ideas of quantum theory.The first publications of Schrodinger about atomic theory and the theory of spectra began in the 1920's in Vienna Austria. He used mathematical equations to describe the likelihood of finding an electron in a certain position, his atom is known as the quantum mechanical model of the atom. ]]> 2018-10-05 12:03:09 UTC https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289559495 cuccohannahr https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289562963 He was an English chemist, physicist and meteorologist, known for introducing atomic theory in chemistry. Some things he learned/discovered and put into his own atomic theory in 1803, in Manchester is elements are made of small particles (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 destroyed, ect. ]]> 2018-10-05 12:12:22 UTC https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289562963 cuccohannahr https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289566770 At Trinity collage at Cambridge England, 1897,  he discovered the electron by experimenting cathode ray. He learned and explains that cathode rays were negativity charged, his model did not have a negative or positive charged particles]]> 2018-10-05 12:20:55 UTC https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289566770 cuccohannahr https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289575913 in 1913 ]]> 2018-10-05 12:40:41 UTC https://padlet.com/cuccohannahr/y1qh3nwhppcz/wish/289575913