Elements  Differences in the atoms that make up the elements
Current model of the atom <ul><li>Nuclear atom </li></ul><ul><ul><li>Almost all of the mass of the atom is located in the ...
The Nuclear Atom
Proton <ul><li>Has a charge of 1+ </li></ul><ul><li>Has a mass of approximately 1 amu (atomic mass unit) </li></ul><ul><li...
Electrons <ul><li>Have a charge of 1- </li></ul><ul><li>Have a negligible mass (1/2000 of a proton) </li></ul><ul><li>Foun...
Neutrons <ul><li>Are neutral, have no charge </li></ul><ul><li>Have a mass of approximately 1 amu </li></ul><ul><li>Found ...
What is an Isotope? <ul><li>Atoms with the same number of protons (so they are the same element) </li></ul><ul><li>But the...
Two isotopes of Sodium
How do we write that? <ul><li>23 </li></ul><ul><li>11 </li></ul><ul><li>Na </li></ul>
Or <ul><li>Na-23 </li></ul>
Na-23 has <ul><li>11 protons (atomic number) </li></ul><ul><li>11 electrons (neutral atom) </li></ul><ul><li>12 neutrons (...
Na-23 is an isotope <ul><li>It has the same number of protons as other atoms of sodium </li></ul><ul><li>It is a neutral a...
Atomic Numbers <ul><li>Atomic number is the number of protons in an atom </li></ul><ul><li>Mass number is the sum of the n...
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MInooka Ions and Isotopes

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MInooka Ions and Isotopes

  1. 1. Elements Differences in the atoms that make up the elements
  2. 2. Current model of the atom <ul><li>Nuclear atom </li></ul><ul><ul><li>Almost all of the mass of the atom is located in the nucleus </li></ul></ul><ul><ul><li>All of the volume of the atom is made up by the electron cloud, which is mostly empty space </li></ul></ul>
  3. 3. The Nuclear Atom
  4. 4. Proton <ul><li>Has a charge of 1+ </li></ul><ul><li>Has a mass of approximately 1 amu (atomic mass unit) </li></ul><ul><li>Found in the nucleus </li></ul><ul><li>The number of protons identifies the type of atom </li></ul><ul><li>The number of protons = the atomic number of the element </li></ul>
  5. 5. Electrons <ul><li>Have a charge of 1- </li></ul><ul><li>Have a negligible mass (1/2000 of a proton) </li></ul><ul><li>Found in the electron cloud in orbitals </li></ul><ul><li>Are the particle of the atom that are responsible for the chemical bonds </li></ul><ul><li>Neutral atoms have the same number of electrons as protons </li></ul>
  6. 6. Neutrons <ul><li>Are neutral, have no charge </li></ul><ul><li>Have a mass of approximately 1 amu </li></ul><ul><li>Found in the nucleus </li></ul><ul><li>Are the particle of the atom that is responsible for isotopes </li></ul>
  7. 7. What is an Isotope? <ul><li>Atoms with the same number of protons (so they are the same element) </li></ul><ul><li>But they have different numbers of neutrons </li></ul><ul><li>Thus, they are atoms of the same element that have different masses </li></ul>
  8. 8. Two isotopes of Sodium
  9. 9. How do we write that? <ul><li>23 </li></ul><ul><li>11 </li></ul><ul><li>Na </li></ul>
  10. 10. Or <ul><li>Na-23 </li></ul>
  11. 11. Na-23 has <ul><li>11 protons (atomic number) </li></ul><ul><li>11 electrons (neutral atom) </li></ul><ul><li>12 neutrons (atomic mass of 23 amu) </li></ul>
  12. 12. Na-23 is an isotope <ul><li>It has the same number of protons as other atoms of sodium </li></ul><ul><li>It is a neutral atom (no charge, same number of electrons as protons) </li></ul><ul><li>It has different number of neutrons than other sodium atoms </li></ul>
  13. 13. Atomic Numbers <ul><li>Atomic number is the number of protons in an atom </li></ul><ul><li>Mass number is the sum of the number of neutrons and the number of protons in a given atom </li></ul><ul><li>The atomic mass number on the periodic table is a weighted average mass of all known isotopes of that element </li></ul>

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