Chemistry homework help please?!?

Question

ok, i have this question i have no clue how to answer it.. please help me! =) thx! it sais..

*describe thomson's,millikan's, and rutherford's contributions to atomic theory. Include their experiments if appropriate*

Answer 1

I agree with the other kid. The lecturer tells you everything you need to know OR your textbook does.

Answer 2

Joseph John Thomson subjected cathode rays to magnetic and electric fields and showed that the beam was deflected as would be expected for negatively charged particles. He calculated the ratio of the electron's charge to its mass. On April 30, 1897, Thomson announced that the cathode rays consisted of negatively charged particles, which represented fundamental particles of matter. He was not the first person to suggest that these particles existed, nor did he coin the term "electron", yet he is generally credited with the discovery of the electron. He was awarded with the Nobel Prize in Physics in 1906.
J.J. Thomson is also remembered for his "plum-pudding" model of the atom, which suggested a solid atom with positively and negatively charged particles evenly distributed throughout the mass of the atom.

Lord Rutherford predicted the existence of the neutron is 1920. Walter Bothe obtained evidence of the neutron in 1930. However it was James Chadwick, who repeated Bothe's work, who is known as the discoverer of the neutron. He found these uncharged particles with essentially the same mass as the proton. He was awarded the Nobel Prize in physics in 1935.

Answer 3

You're sitting at a computer conneted to the internet. Try this new thing they've made called 'Research'. Don't bother asking a load of schlubs on YA to help you - do it off your own back and you'll feel much better.

Answer 4

the last one discovered neurons in an atom i think.. but seeing as you are sitting at a computer with internet access then find out yourself!

Answer 5

http://www.visionlearning.com/library/module_viewer.php?mid=50