Atom Structure Theories

Topics: Atom, Neutron, Electric charge Pages: 3 (799 words) Published: January 19, 2013
Chemistry: Atom structure theories
Scientific research is a multistage and complicated process which requires many creative minds to contribute into its creation in order to be efficacious and present solid results. I’ve been given an information sheet apprising ideas of four scientists whose work was very significant in creating the theory about atom structure we recognise nowadays. Guiding Questions: 1 What significant contribution did each of the following people make to present ideas about the structure of atoms? a. Thomson development? Part 1 a. Thomson, who presented a theory of “plum pudding model”. The most important part of his study was the discovery of the electron (e−). Without this knowledge, latter scientists wouldn’t have developed experiments leading to further atom structure disclosure, and wouldn’t be able to expect the results caused by positively and negatively charged particles, such as those between alpha (α)particles and gold (Au). Although Thomson’s conception of electrons (e−) located randomly was wrong, the notion of their existence itself was crucial. b. Rutherford c. Bohr d. Chadwick 2 In what way does scientists’ knowledge about the structure of atom impact our life and world’s

b. Rutherford’s remark on the fact that “most of the mass and positive charge in atom must be concerned in (...) nucleus” [1]

was a huge step forward. He also have noted that according to his research results , which didn’t fit in with Thomson’s model, electrons (e−) move in the space around nucleus. Another significant contribution of his was to demonstrate what occurs during radioactive decay of an element He hasn’t created a

precise model of the atom nor has he included definite delineation of electrons (e−) movement, though. [1] information sheet given by the teacher

c. Bohr’s work was a complement to atom model introduced by Rutherford. His theory clarified the model of the atom , primarily by stating that electrons (e−) move in stable orbits...
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