Atomic Models
| Name | Year | Description |
| John Dalton | early 1800's |
atoms are un-cuttable; they are spherical in shape; did not elaborate on charges |
| JJ Thomson |
1897 | discovered the electron; plum pudding model where the positive spherical nucleus is distributed with negatively charged electrons |
| Ernest Rutherford |
1911 | The nucleus of the atom is made up of positively charged protons. Electrons go around the nucleus in a stationary orbit. Thus, atom is mostly empty space. |
| Neils Bohr | 1913 | Electrons orbit around the nucleus at different levels |
| James Chadwick | 1932 | discovered neutrons in the nucleus |
| Nama | Tahun | Huraian |
| John Dalton |
awal 1800an |
atom-atom tidak boleh di"potong"; berbentuk sfera; tiada penjelasan mengenai cas-cas |
| JJ Thomson | 1897 | menjumpai elektron; model "plum pudding"
di mana nukleus atom terdiri daripada proton-proton bercas positif
|
| Ernest Rutherford | 1911 | nukleus atom terdiri daripada proton-proton bercas positif. Elektron-elektron berpusing mengelilingi nukleus pada orbit tetap. Atom terdiri daripada ruang kosong. |
| Niels Bohr |
1913 | Elektron-elektron berada pada orbit-orbit berlainan. |
| James Chadwick | 1932 | menjumpai neutron-neutron yang tidak bercas dalam nukleus |
