-
B.C
No one argued, because he tutored famous people. All things made up of water earth air and fire. -
B.C
everything made of atoms -
B.C
Everything made up of building blocks -
Dalton's Atomic Theory
1.All elements composed of indivisble atoms
2.Atoms of same elemnt are the same. Atoms from different elements are different.
3.Atoms make compounds
4.Atoms rearranged in chemical reactions. Not created or destroyed -
Periodic Table, sorted elements by weight, left gaps for undiscovered elements
-
Discovered Electrons with Cathode Ray Tube
-
found charge and mass of electron
Plum Pudding Model -
Positive nucleus with electrons around. Nucleus tiny and dense.
-
Electrons orbitted in rings, or energy levels. Could jump levels to emit energy.
-
Discovered Neutron because masses weren't makins sense.
-
Atomic energy research. Asked to create the atomic bomb. Successfuly split an atom, releasing the energy contained within. Disproved Bohr.
