Subatomic Particles Names, Properties, and Locations Atomic mass and isotopic mass Ions by Lisa Allen
Protons  <ul><li>Positive charge </li></ul><ul><li>Found in the nucleus </li></ul><ul><li>Mass of 1 AMU (atomic mass unit)...
How many protons are there in...? <ul><ul><ul><ul><li>Uranium-238? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Carbon? </...
Neutrons <ul><li>No charge </li></ul><ul><li>Found in the nucleus </li></ul><ul><li>Mass of 1 AMU (atomic mass unit) </li>...
How many neutrons are there in...? <ul><ul><ul><ul><li>Carbon atoms? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Sodium a...
Average atomic mass and Isotopes <ul><li>Question to show the point – How many kids are there in your family?  </li></ul><...
Finding the mass of an isotope <ul><ul><ul><li>Add the number of protons and the number of neutrons </li></ul></ul></ul><u...
Electrons  Negative Charge Found in energy levels outside the nucleus Mass of 1/1836 AMU (almost nothing!) The number of e...
How many electrons are there in...? <ul><ul><ul><ul><li>Carbon? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Sodium +1  io...
Practice these! <ul><li>http://chemistry2.csudh.edu/homework/hwintro.html </li></ul><ul><ul><ul><ul><li>Go to   11 </li><...
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Subatomic Particles

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Subatomic Particles

  1. 1. Subatomic Particles Names, Properties, and Locations Atomic mass and isotopic mass Ions by Lisa Allen
  2. 2. Protons <ul><li>Positive charge </li></ul><ul><li>Found in the nucleus </li></ul><ul><li>Mass of 1 AMU (atomic mass unit) </li></ul><ul><li>The number of protons in an atom is equal to the atomic number of that element. This is always true. So an atom of oxygen always has 8 protons, no matter what else about that atom is different. An atom with 11 protons is always sodium. ALWAYS. </li></ul>
  3. 3. How many protons are there in...? <ul><ul><ul><ul><li>Uranium-238? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Carbon? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Zinc? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Gold? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Potassium ions? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Chlorine gas atoms? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Lithium found in pills? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Carbon found in CO 2 ? </li></ul></ul></ul></ul>
  4. 4. Neutrons <ul><li>No charge </li></ul><ul><li>Found in the nucleus </li></ul><ul><li>Mass of 1 AMU (atomic mass unit) </li></ul><ul><li>The number of neutrons in an atom is equal to the atomic mass minus the atomic number of that element. </li></ul>
  5. 5. How many neutrons are there in...? <ul><ul><ul><ul><li>Carbon atoms? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Sodium atoms? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Silver atoms? </li></ul></ul></ul></ul>
  6. 6. Average atomic mass and Isotopes <ul><li>Question to show the point – How many kids are there in your family? </li></ul><ul><li>Average number may not be the number in any particular family! </li></ul><ul><li>Isotopes are atoms with a specific number of neutrons. They have the same number of protons, the same charge, but have a specific atomic mass. </li></ul><ul><li>Isotopes can be identified with 2 different notations </li></ul><ul><ul><ul><ul><ul><li>Hyphen notation: Carbon - 14 </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Nuclear symbol notation: 14 6 C (hard to type!) </li></ul></ul></ul></ul></ul><ul><li>To find the number of neutrons in an isotope, subtract the number of protons (atomic number) from the atomic mass. </li></ul>
  7. 7. Finding the mass of an isotope <ul><ul><ul><li>Add the number of protons and the number of neutrons </li></ul></ul></ul><ul><ul><ul><li>Practice? </li></ul></ul></ul><ul><ul><ul><li>What is the mass of the isotope of carbon with 8 neutrons? </li></ul></ul></ul><ul><ul><ul><li>What is the mass of the isotope of aluminum with 14 neutrons? </li></ul></ul></ul>
  8. 8. Electrons Negative Charge Found in energy levels outside the nucleus Mass of 1/1836 AMU (almost nothing!) The number of electrons in a neutral atom is equal to the number of protons. The number of electrons in an ion is different from the number of protons .
  9. 9. How many electrons are there in...? <ul><ul><ul><ul><li>Carbon? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Sodium +1 ion? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Uranium – 238? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Cl - ion? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>O 2- </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Magnesium? </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Cobalt? </li></ul></ul></ul></ul>
  10. 10. Practice these! <ul><li>http://chemistry2.csudh.edu/homework/hwintro.html </li></ul><ul><ul><ul><ul><li>Go to  11 </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Get 10 right out of 12 or fewer attempts </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Submit to LAllen </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Print confirmation for your records </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Submit confirmation </li></ul></ul></ul></ul>

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