https://padlet.com/jocelyndolence/vhmyl7276thu30k6 en-us 2023-01-31 13:00:00 UTC 2023-01-31 15:02:55 UTC hello@padlet.com jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462944845 Democritus predicted that matter was made of tiny particles called atoms. ]]> 2023-01-31 13:04:44 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462944845 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462946766 Aristotle denied the existence of atoms. ]]> 2023-01-31 13:06:12 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462946766 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462948028 Created the Atomic Theory.]]> 2023-01-31 13:07:21 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462948028 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462953089 - Matter composed of small particles called atoms.
- Atoms of given element are identical to each other, but different from atoms of any other element. 
- Atoms can't be created, divided, or destroyed.
- Different atoms combine in simple whole number ratios.
- In a chemical rxn, atoms are separated, combined, or rearranged. ]]> 2023-01-31 13:11:27 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462953089 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462956186 Scientists believed there to be a connection between matter and electricity, which led to the development of of cathode ray.
- Stream of charged particles.
- These particles are negative. ]]> 2023-01-31 13:13:39 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462956186 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462991607 Negatively charged particles that are part of all matter.
Proved Dalton wrong - atoms subdivided.]]> 2023-01-31 13:37:16 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462991607 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462994422 Discovered Plum Pudding model]]> 2023-01-31 13:39:02 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462994422 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462996683 Discovered nucleus of the atom using thin gold film and alpha particles (positively charged). ]]> 2023-01-31 13:40:34 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462996683 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462999651 Nucleus is a tiny, dense region in an atom; has the atoms positive charge and most of its mass. ]]> 2023-01-31 13:42:26 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2462999651 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463004013 Due to his experiment in 1909, Rutherford was able to conclude that the Plum Pudding Model made by J.J. Thomson was incorrect. ]]> 2023-01-31 13:45:09 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463004013 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463005675 A piece of gold foil was hit with alpha particles, which have a positive charge. Most alpha particles went right through. This showed that the gold atoms were mostly empty space.]]> 2023-01-31 13:46:11 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463005675 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463012843 Protons are positively charged atomic particles located in the nucleus, discovered by Rutherford. ]]> 2023-01-31 13:50:18 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463012843 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463015819 Chadwick proved the existence of neutrons in atoms. ]]> 2023-01-31 13:52:16 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463015819 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463018985 Chadwick discovered the neutron which is a subatomic particle in the nucleus with no charge but a lot of mass. ]]> 2023-01-31 13:54:24 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463018985 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463021273 Made foundational contributions to understanding atomic structure and quantum theory.]]> 2023-01-31 13:55:57 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463021273 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463023682 Niels Bohr created the Bohr Model after studying the way glowing, hot hydrogen gives off light.]]> 2023-01-31 13:57:29 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463023682 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463129794 Schrödinger used mathematical equations to describe the likelihood of finding an electron in a certain position.]]> 2023-01-31 14:57:15 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463129794 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463135430 Thomson proposed the plum pudding model of the atom, which had negatively charged electrons embedded within a positively-charged "soup." ]]> 2023-01-31 15:00:13 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463135430 jocelyndolence https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463140099 Philosophers created the idea of matter made up of earth, water, air, and fore (the ¨elements¨).
- Thales 
- Anaximander
- Anaximenes
- etc. ]]> 2023-01-31 15:02:55 UTC https://padlet.com/jocelyndolence/vhmyl7276thu30k6/wish/2463140099