During this long process of the discovery the atom, took many models and scientists. The entire group of scientists who assisted in the discovery of the atom used each other’s model to improve each other’s theories. Firstly, John Dalton showed that, collectively, the three laws, the law of definite proportion, the law of conversation of masses, and the law of multiple proportion.

These three laws demonstrate the existence of the atom. Also, Using these three laws he developed a theory called, Dalton’s Atomic Theory. This includes five basic principles; 1) all matter is made of indivisible and indestructible atoms, 2) atoms of a given element are identical in their physical and chemical properties, 3) atoms of different elements have different physical and chemical properties, 4) atoms of different elements combine in simple whole-number ratios to form chemical compounds, 5) atoms cannot be subdivided, created or destroyed when they are combined, separated, or rearranged

Helping Bohr’s model become superior, Plank declared that energy comes in packets or bundles of energy that is discontinued. This went all against classical science and he was not favored with the other scientist. Helping prove Bohr’s model he used the bright-line spectrum, which helped him prove his model. There was one flaw in his model, which was that it did not work with multiple elements. After Bohr and Plank, another educated scientist came along who was DeBroglie, he purposed the Wave Particle Duality Theory. This theory stated that matter can act like waves, and waves can act like particles. To prove his theory he used the mathematical expression of mc=hc. Which meant that the m stood for the mass particles and the stood for the wavelength.

In the discovery of the electron he used the Cathode-ray tube. As he researched he came up with a model of the atom, he stated that the atom was a “plum pudding model.” This model featured negatively charged electrons embedded in a ball of positive charge. After, J.J. Thompson came Ernst Rutherford, who was a student of Mr. Thompson. He created “gold-foil experiment” which untimely-disproved J.J. Thompson’s theory. In this experiment he directed a beam of alpha particles at a very thin gold foil sheet. This was so the Rutherford could measure the angles of the particles coming off the

Some topics in this essay:
Duality Theory, Atomic Theory, JJ Thompson’s, John Dalton, JJ Thompson, Niels Bohr, Helping Bohr’s, Ernst Rutherford, Atom Throughout, Bohr Plank, electron cloud, discovery atom, atom scientists, model electron cloud, gold foil sheet, chemical properties, physical chemical, gold foil, bohr’s model, existence atom, stand rungs, person stand rungs, physical chemical properties, alpha particles, current model electron,