J.J. Thomson His model of the atom. Covered in this lesson This lesson explains JJ Thomson's experiments that led to the discovery of the electron. –
Post on 30-Dec-2015
J.J. ThomsonHis model of the atom
Covered in this lessonThis lesson explains JJ Thomson's experiments that led to the discovery of the electron.
The discovery of negatively charged electrons smaller than the atom using a cathode ray tube.
Cathode Ray TubeA cathode ray tube is a glass tube with most of the air taken out and metal on both ends.An electrical current is applied (electron beam)
Discovery of the Particles, We Call ElectronsJ.J. Thomson found the beam was deflected by electric and magnetic fields.He determined the beam consisted of negatively charged particles smaller than atoms that we now call electrons.He found electrons in atoms of various metals and suggested they are found in all atoms.
J. J. Thomsons ModelJ.J. Thomsons model of the atom consists of a sphere filled with a positively charged cloud containing negative particles (electrons) spread throughout the cloud.