Protons, Neutron, and Electrons

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Protons, Neutron, and Electrons

• Jeremy Fisher
• Nicole Schaeffer
• Spring 2003

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Protons

• A particle having a positive electrical charge e
• Every atomic nucleus contains protons
• For more information hit the link
  http//www.neutron.anl.gov/hyper-physics/proton.ht
  ml
• Protons are equal to the atomic number

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Neutrons

• Neutrons are neutrally charged particles within
  the atomic nucleus
• They were discovered by James Chadwick in 1932
• In a nuclear accelerator they determined that
  neutrons are formed by quarks, one up and two
  down
• Are equal to the atomic mass subtracted by the
  atomic number

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Electrons

• Are negatively charge particles that encompasses
  the atomic nuclei e-
• Were discovered by J.J. Thomson.
• Are also equal to the atomic number unless the
  atom is an ion such as a 1, -2, -3

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Example

• Helium has an atomic of 2 and a atomic mass of
  4.00 g/mol
• of Protons 2 (atomic )
• of Neutrons 2 (Mass- Atomic
• 4.00-2.00 2.00)
• of electrons 2 (atomic )

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Diagram on Finding Protons, Neutrons, and
Electrons

• http//www.lcusd.net/lchs/jwalters/determining.htm
  l

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Lets take a Quiz

• The number of protons, neutrons, electrons
  of Magnesium the atom is 12 and the atomic mass
  is 24.
• 12, 12, 12
• 12, 24, 12
• 1,2,1

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That is an incorrect answer

• The answer to the question was 12,12,12
• Reason
• Atomic number 12
• Mass number- 24
• Number of neutrons- 12

Next ?
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Question 2

• How many Protons are in Uranium if it has an
  atomic number of 92 and an atomic mass of
  238? 238 310 92

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That is an incorrect answer

• The answer to that question was 92 because
  that is the atomic number of 92 equals the number
  protons.

Next ?
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Question 3

• What is the number of Neutrons of the Element
  Mercury (Hg) if it has an atomic number of 80 and
  an atomic mass of 201?
• 80
• 201
• 121

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That is an incorrect answer

• For the element of Mercury (Hg) you take the
  atomic mass which is 201 and subtract from it the
  atomic number which has a value of 80.
• Example
• 201- 80 121

Next Slide
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Work Consulted

• http//www.lcusd.net/lchs/jwalters/determining.htm
  l
• http//www.neutron.anl.gov/hyper-physics/proton.ht
  ml
• http//education.jlab.org/glossary/quark.html
• www-istp.gsfc.nasa.gov/Education/welect.html

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The End

• This is the end of the tutorial on how to find
  the number of protons, neutrons, and electrons I
  hope you enjoyed it.