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Physical Chemistry

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The law of multiple proportions that posits that when 2 chemical elements combine to produce more than one likely compound then the proportion of the second element’s mass that joined with a specific mass of the first element will be represented as proportions of whole numbers (Niaz, 2001). Te results of this laid the foundation for Dalton’s Atomic Laws. Tese are made up of five theorems. Te first theorem posits that an element, i its unmixed state, i made up of particles referred to as atoms. Te second posits the atoms in a particular element are similar.

Te third posits that distinguishing atoms belonging to different elements can be done by using their different atomic weights. Furth, tat compounds are made when atoms are combined. Ad lastly, i is not possible to either create or destroy atoms in a chemical reaction, te only thing that changes is the grouping. Pevious chemists were not able to make the breakthroughs that Dalton made because in the times before him the laboratory instruments that existed were very crude and could not pecise measurements.

Dlton’s development on the atomic model made it possible for more researchers and scholars to study the atom in greater detail. I 1897, J Thomson discovered the electron, ad his discovery opened people’s eyes to the fact that atoms were in fact made up of tinier particles. B this time however, dscovery of the atomic nucleus was still years away, ad therefore the plum pudding model was proposed in 1904. Te model states that the atom is composed of electrons which drift freely in a soup of charges.

Te model did not explain how the electrons were organized inside the atom (Hon & Goldstein, 2013). I 1911 Ernest Rutherford established the planetary model of the atom that stated that the protons were found in the nucleus of the atom and then put the electrons in orbiting paths round the nucleus (Nagendrappa, 2011). Nels Bohr further developed Rutherford’s model by putting forward then idea that the orbiting electrons could only move around the nucleus in definite orbits at distinct energy levels around the atom’s nucleus 2013). Jhn played a crucial role in setting the ball in motion regarding studies about the nature of the atom, ad how the atoms in an element came together in various proportions to form compounds.

H pioneered the way for the likes of J. Tomson, Enest Rutherford and Niels Bohr to carry. ..

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preview essay on Physical Chemistry
  • Pages: 4 (1000 words)
  • Document Type: Essay
  • Subject: Chemistry
  • Level: Undergraduate
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