Subatomic Particles Copyright 2010 by Darrell Causey Jr
Sub-atomic Particles Copyright © 2010 by Darrell Causey, Jr.
Nucleons The particles found in the nucleus. Copyright © 2010 by Darrell Causey, Jr.
The Proton Copyright © 2010 by Darrell Causey, Jr.
Canal Ray Tube Canal rays are positive Copyright © 2010 by Darrell Causey, Jr.
Canal Rays Could the positive charge in the atomic nucleus be a particle? Copyright © 2010 by Darrell Causey, Jr.
Positive Particle? + e Copyright © 2010 by Darrell Causey, Jr.
Positive Particle? J. J. Thomson determined the charge to mass ratio. e/m Copyright © 2010 by Darrell Causey, Jr.
Positive Particle? Assuming the positive charge to have that same magnitude as the electron … e = +1. 602 x 10 -19 Coulombs Copyright © 2010 by Darrell Causey, Jr.
Positive Particle? The mass of the positive charge is… 1. 673× 10 -27 kg Copyright © 2010 by Darrell Causey, Jr.
Positive Particle? Ernest Rutherford suggested the particle be called … Proton Copyright © 2010 by Darrell Causey, Jr.
Questions? Copyright © 2010 by Darrell Causey, Jr.
Atomic Number Copyright © 2010 by Darrell Causey, Jr.
Atomic Number Henry Moseley Studied the x-rays of several elements. Copyright © 2010 by Darrell Causey, Jr.
Atomic Number Discovered. . . 1. The wavelengths decrease as the atomic masses increase Copyright © 2010 by Darrell Causey, Jr.
Atomic Number Discovered. . . 2. The frequency and energy INCREASES Copyright © 2010 by Darrell Causey, Jr.
Atomic Number Discovered. . . 3. The increase was constant from one element to the next. Copyright © 2010 by Darrell Causey, Jr.
Atomic Number The difference in elements is determined by the positive charge. Copyright © 2010 by Darrell Causey, Jr.
Questions? Copyright © 2010 by Darrell Causey, Jr.
The Neutron Copyright © 2010 by Darrell Causey, Jr.
The Neutron James Chadwick Proved the existence of the neutron. Copyright © 2010 by Darrell Causey, Jr.
3 Particles? The mass of the proton could not account for all the mass in nucleus. There must be another particle! Copyright © 2010 by Darrell Causey, Jr.
Predictions 1. It must be neutral. 2. It should be about the mass of a proton. 3. It must be in the nucleus. Copyright © 2010 by Darrell Causey, Jr.
Neutral Particle In 1932 James Chadwick proved the existence of the … Neutron Copyright © 2010 by Darrell Causey, Jr.
Questions? Copyright © 2010 by Darrell Causey, Jr.
Thought … Why did it take so long to find the neutron? Copyright © 2010 by Darrell Causey, Jr.
Sub Atomic Particles Subatomic Particle Relative Charge Location Relative Mass electron -1 atomic space 0 amu proton +1 nucleus 1 amu neutron 0 nucleus 1 amu Copyright © 2010 by Darrell Causey, Jr.
Questions? Copyright © 2010 by Darrell Causey, Jr.
Check out … www. mrcausey. com For more information. Copyright © 2010 by Darrell Causey, Jr.
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