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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
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- 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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