Chemistry Question

Extra credit assignment15 points
Writing assignment based on original
experiments performed by scientists through
decades works that leads to finding of subatomic particles, protons, Electrons, neutrons
and atomic structure.
This is an extra credit assignments
Value of 15 points
Write a summary of Rutherford/J. Thomson/
Millken/Chadwik experiments and their finding of
atomic sub-particles. You will also write Bohr atomic
model. You submit your work to the blackboard.
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Scientist Experiments to detect atomic sub-particles
1-Ernest Rutherford Gold experiment: find positive charge particles
within atoms, which are condensed


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Matters contain negative particles and neutral history of finding
Electron and John Thomson experiment find electron charge and
electron Mass (charge/mass ratio)
https://www.youtube.com/watch?v=fUvBQ
L3WG50

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Niels Bohr atomic structure model/based on atomic spectrum


Hydrogen Line spectrum:

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Subatomic Particles
Subatomic
particle
Mass
g
Mass
amu
Location
in atom
Proton
1.67262 x 10-24
1.0073
nucleus
1+
p, p+, H+
Neutron
1.67493 x 10-24
1.0087
nucleus
0
n, n0
Outside the
1-
e, e-
-24
Electron 0.00091 x 10 0.00055
Charge Symbol
nucleus
Memorize the information in yellow
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