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Atomic Models

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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
    

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Model-model Atom

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


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