1) Who were the main characters in the development of the atom? Why were they vital to the development of the atom? What made them different if anything?
-Democritus, Greece - stated that all matter is made up of atoms. He also stated that atoms are eternal and invisible and so small that they can’t be divided, and they entirely fill up the space they’re in.
-John Dalton (1803), England - formed the atomic theory, which states that all matter is composed of tiny, indestructible particles called atoms that are all alike and have the same atomic weight.
-J.J Thomson (1898), England - discovered the electron and developed the plum-pudding model of the atom.
Ernest Rutherford (1909), England - used the results of his gold-foil experiment to state that all the mass of an atom were in a small positively-charged ball at the center of the atom.
-Neils Bohr (1913), Denmark - stated that the electrons moved around the nucleus in successively large orbits. He also presented the Bohr atomic model which stated that atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states.
-Chadwick (1931), England - discovered the neutrally-charged neutron.
-Otto Hahn (1938), Germany - discovered nuclear fission, in which the nucleus of an atom breaks up into two separate nuclei, while experimenting with uranium.
2) Think about your lessons in history and discuss how the time period that they lived in determined the outcome of their discovery/ or how it influenced those individuals to be the names that we know today (aka did it matter where they grew up or if they had money?)
-Depending on when they grew up and how they lived determined how they thought and saw things. Some people took the work of others and added their own thoughts and ideas to the experiments. Others found out new discoveries by simply being curious about the subject.
3) Why do we consider the atomic theory still a theory?
-The atomic theory is still a theory because only some of it has been proven.
4) Why does it matter that we understand the structure of the atom?
-Everything is made up of atoms. We need to know the basics of atoms so that we can understand and learn from the information we gather from them.
I think you described everything very thoroughly and your facts were very good. Good Job!
ReplyDeleteEverything looks ok, except that when you stated John Dalton's atomic theory, you left out an important phrase which changes the entire meaning of the theory. You stated that "John Dalton formed the atomic theory, which states that all matter is composed of tiny, indestructible particles called atoms that are all alike and have the same atomic weight."
ReplyDeleteI believe that Dalton stated that all atoms "of the same element" are alike and have the same atomic weight.
I think that an atom of Hydrogen and an atom of Chlorine have different atomic weights and are not alike.