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Models o atoms
Dalton (billiard model) | All atoms are identical, solid spheres, Can combine to form compounds |
JJ Thomson (plum puddin) | NO NUCLEUS, Atom is neutrally charged, Consists of positive matter with electrons embedded within, Used cathode ray tubes (the electrons were what caused the glow, and no one knew how they worked) |
Earnest rutherford (nuclear model) | Has a positive nucleus with empty space between itself and the orbiting electrons. Mostly empty space. The empty space was discovered by shooting alpha and beta particles at a thin gold foil, the rays bounced off at angles because of nucleus, sum go thru |
Neils Bohr (planetary model) | Added more order to the atom, discovered that the closest orbiting electrons were the weakest charged. He excelerated electrons by using pressurized gasses, electrons were found to move energy levels when losing or gaining energy |
Chadwick (big bang theory model(my own words)) | Discovered the neutral neutron. Irradiated beryllium and discovered a subatomic particle with an undocumented reaction, this being the neutron |
Shrodinger (Electron cloud model) | Discovered that electrons kinda just float around in a cloud, not in an orbit pattern, The closer to the nucleus, the more likely it is to find an electron. |
Democritus | Solid balls be making up EVERTHing |
Vallence electrons | Determine the family (group) (columns)number based on the amount of valence electrons |
Valence Electron level number | The valence level of electrons determines the period (rows) |