Atom by Kiele Bactad https://padlet.com/beaumontunified/ostk3glu3trolcqf en-us 2020-10-08 17:48:21 UTC 2025-08-04 02:56:34 UTC hello@padlet.com JJ. Thomson 1897 kbactad30816 https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815315461 using cathode-ray tubes he identified the electron and determines the ratio of the mass of an electron to its electric charge]]> 2020-10-08 20:09:21 UTC https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815315461 James Chadwick 1932 kbactad30816 https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815327394 proved the existence of neutrons]]> 2020-10-08 20:14:04 UTC https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815327394 Ernest Rutherford 1911 kbactad30816 https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815336833 using a gold foil experiment Rutherford determined properties on the nucleus, including charge, relative size, and density ]]> 2020-10-08 20:17:51 UTC https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815336833 Dalton 1766-1844 kbactad30816 https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815343403 matter is composed of extremely small particles called atoms
atoms are indivisible and indestructible
atoms of a given elements are identical in size, mass, and chemical properties
atoms of a specific element are different from those of another element
different atoms combine in simple whole-number ratios to form compounds
in a chemical reaction, atoms are separated, combined or rearranged]]> 2020-10-08 20:20:31 UTC https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815343403 Aristotle 384-322 b.c kbactad30816 https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815347648 atoms moved through empty space

]]> 2020-10-08 20:22:20 UTC https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815347648 Democritus 460-370 B.C kbactad30816 https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815357270 matter is composed of atoms, which move through empty space
atoms are solid, homogeneous, indestructible, and indivisible
different kinds of atoms have different size and shapes ]]> 2020-10-08 20:26:21 UTC https://padlet.com/beaumontunified/ostk3glu3trolcqf/wish/815357270