-
Issac Newton
In 1687, he published his most acclaimed work, Philosophiae Naturalis Principia Mathematica .
He believed that there were little tiny pieces of mass that were 'swimming' everywhere.
Proposed a mechanical universe with small solid masses in motion.
It formed the foundation on which the technological civilization of today rests on. -
John Dalton
Purposes the atomic theory.
Has a model called Billiard Ball Model.
Thought that elements consisted of tiny particles called atoms.
He also said that atoms of the same element are identical. -
Micheal Faraday
His main discoveries include those of electromagnetic induction, diamagnetism and electrolysis.
He is famous for his Magnetic Field Experiment.
He connected the coil to a galvanometer, and then moved a magnet back and forth inside the cylinder.
From his experiments came devices which led directly to the modern electric motor, generator and transformer. -
JJ Thompson
He discovered that atoms contained particles known as electrons.
He found this out, through finding that cathode rays could be deflected by an electric field. Which shows that these rays were full of very small negatively charged particles which he called ‘corpuscles’. They later in the future were named ‘electrons’.This show Stoney’s hypothesis completely was correct. -
Max Planck
He discovered the quantum theory, by studying the nature of light and other radiation. He said at very small scales, that matter was discrete rather than continuous. That mean that we know that atoms act different to the human-scale world that we know and understand. -
Hantaro Nagaoka
He developed an early, incorrect "planetary model" of the atom that was based around an analogy to the explanation of the stability of Saturn’s rings. It had a big nucleus, with electrons moving around the nucleus, bound by electrostatic forces. But, this analogy was wrong even though the electrons revolving around the nucleus was correct, and was left in 1908.This model helped develop the idea of the nucleus of an atom being orbited by electrons. -
Robert Millikan
Meh measured the charge on an electron with his oil-drop apparatus. He showed that this quantity was a constant for all electrons, demonstrating the atomic structure of electricity. This means that we know all the electrons in every atom has the same exact charge. -
Rutherford
He formulated a model of the atom, which was like a very small positively charged nucleus, surrounded by electrons. He speculated on the existence of ‘neutrons’, which could explain for the repelling effect of the positive charges of protons by causing an attractive nuclear force and then keeping the nuclei from falling apart. He discovered the basic form of an atom without protons and electrons. -
Websites used
