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  • 
  • Today we are going to be looking at Subatomic Particles, Element Symbols and Isotope Notation!
  • Subatomic particles are what are within and make up an atom
  • 
  • Three types
  • Protons have a positive charge and are located in nucleusElectrons have a negative charge and are located in the electron cloud Neutrons have a neutral charge and are located in the nucleus with the protons
  • ProtonsElectronsNeutrons
  • 25
  • 12
  • Mg Magnesium
  • Isotope Notation is just the element name-mass #. For example, Magnesium-25!
  • 2+
  • Top Left=Mass # (protons + neutrons)Top Right =chargeBottom Left+atomic # (protons)
  • 88
  • Rubidium-88=Isotope Notation
  • Rb
  • 37
  • Reasoning: The atomic number is =to the amount of protons; the mass number is protons + neutrons so to find this you need to subtract the mass number by the # of protons; there is no charge so that means that there is an equal amount of protons and electrons. Finally, the isotope notation is the element name-mass number.
  • 3-
  • P=37N=51E=37
  • 9
  • Reasoning: The atomic number on the bottom left is=to the amount of protons; the mass number on the top left is the number of protons+ neutrons, so you need to find the difference of the mass # and the number of protons. There is the same amount of electrons as protons because there is no charge .The isotope notation is the element name, Beryllium,-mass number.
  • Beryllium-9=Isotope Notation
  • Be
  • 4
  • P=4N=5E=4
  • Silicon-28 =Isotope Notation
  • Reasoning: The atomic number is 14, so that means that there is 14 protons as well. The mass # is the # of neutrons and # of protons to find the # of neutrons you need to 28-14 which = 14. To find the # of electrons I looked at the charge. There is a negative charge so that means that there are 2 more electrons than protons. Lastly, the isotope notation is the element name-the mass #
  • 28
  • Si
  • 14
  • 2-
  • P=14N=14E=16
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