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John Dalton's Contribution
Stated that elements are tiny spheres that are indivisible particals called Atoms. -
J.J. Thomson's Contribution
Reasoned that atoms contain negatively charged particles, which were later named Electrons. -
Ernest Rutherford's Contribution
Explained that every atom has a small massive poitively charged center called the Nucleus. -
Niels Bohr's Contribution
Atoms can be divided into a nucleus, electrons and a nucleus. -
Werner Heisenberg
Led to cloud model; electron cloud most indicates where to find a single electron. -
Modern Model
The modern model shows where everything is but now into a clouded form. -
James Chadwick
Neutrons are important to holding together positive charged Protons.