Help please Choose any 6 Scientists
Write down their contribution in discovering atoms/their structures.
(Atleast a paragraph for each)

J.J. Thompson- Discovery Date: 1897. Model: Plum Pudding Model. Discovered the electron. Experiment: Cathode ray. Experiment measured the ratio of an electrical charge to the mass of the electronErnest Rutherford- Discovery Date: 1911. Model: Nuclear Model. Discovered the nucleus of the atom. Experiment: Gold foil experiment. Rutherford shot alpha particles through a tube of gold foil. Particles were reflected due to negatively charged particles in the atomJames Chadwick-Discovery Date: 1932 Model: Planetary Model (with the addition of neutrons in the nucleus). Discovered the neutron inside the nucleus. Chadwick was looking for a neutral particle inside the atom. Experiment: Used kinematics on Beryllium to determine velocity of protons and mass of neutral radiationJohn Dalton- Discovery Date: 1808. Model: Solid sphere model. Dalton's five postulates:All matter consists of atoms. Atoms of the same element are similar in shape and mass. Atoms cannot be created nor destroyed. Atom is the smallest unit of matter. Atoms may combine with each otherDemocritus- Discovery Date: 492 B.C.E. Model: Solid sphere model. Invented the concept of the atom.Erwin Schrodinger- Contribution Date: 1926. Developed the Quantum Mechanical Model.Current atomic model: Shows electrons moving around the nucleus with protons and neutrons in the center.

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