Warning: Use of undefined constant referer - assumed 'referer' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 102

Warning: Use of undefined constant host - assumed 'host' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 105

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 106

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 109
Mini-Research - Paper

Mini-Research

ELECTRON- In 1897, Sir J. J. Thomas, an English physicist, measured the
deflection of cathode-ray particles in magnetic and electrical fields. As a
result he found the ratio of the charge, e, to the mass, m, of the cathode-ray
particles. He found e/m identical to those particles irrespective of the metal
the electrodes were made of or the kind of gas in the tube. In 1909, RA
Millikan, an American scientist, measured that charge. All electrons are found
to be identical no matter their source or the method of liberating them from
matter. From the values of e/m, and e, the mass of an electron was calculated
to be .00055 amu.

PROTON- Eugeen Goldstein used a Crookes tube with holes in ...

Want to read the rest of this paper?
Join Essayworld today to view this entire essay
and over 50,000 other term papers

m was calculated to be 1.0073 amu. This became known as
a proton.

NEUTRON- In 1932, James Chadwick detected the third of the basic parts of an
atom. He showed that uncharged particles, or neutrons, are emitted when atoms
of other elements are bombarded with high-velocity helium atoms with all
electrons remored, or an alpha particle. Neutrons were determined to have a
mass of 1.0087 amu. They are unstable outside of an atom and slowly degenerate
to form protons and ...

Get instant access to over 50,000 essays.
Write better papers. Get better grades.

Already a member? Login

CITE THIS PAGE:

APA
MLA
Chicago
Turabian

Mini-Research. (2006, May 16). Retrieved October 22, 2025, from http://www.essayworld.com/essays/Mini-Research/46005

"Mini-Research." Essayworld.com. Essayworld.com, 16 May. 2006. Web. 22 Oct. 2025. <http://www.essayworld.com/essays/Mini-Research/46005>

"Mini-Research." Essayworld.com. May 16, 2006. Accessed October 22, 2025. http://www.essayworld.com/essays/Mini-Research/46005.

JOIN NOW

Join today and get instant access to this and 50,000+ other essays

PAPER DETAILS

Added: 5/16/2006 05:27:26 PM
Category: Science & Nature
Type: Premium Paper
Words: 286
Pages: 2

Save |

Report

SHARE THIS PAPER

SAVED ESSAYS

Save and find your favorite essays easier