Warm-up  <ul><li>What charges are found in the atom? Where are those charges located? </li></ul><ul><ul><li>There are posi...
3-2: The Structure of an Atom <ul><li>Objectives </li></ul><ul><ul><li>Identify  three subatomic particles and  compare  t...
Properties of Subatomic Particles <ul><li>Proton, Neutron & Electron </li></ul><ul><li>Proton (p+) </li></ul><ul><ul><li>l...
<ul><li>Neutron (n o ) </li></ul><ul><li>-located inside nucleus </li></ul><ul><li>-mass of 1 a.m.u. </li></ul><ul><li>-no...
Comparing Elements <ul><li>Atomic Number (Z) </li></ul><ul><ul><li>the number of  protons  in one atom </li></ul></ul><ul>...
Calculating Numbers of Protons, Neutrons and Electrons.  6 C 12.011 Atomic Number   = 6 6 protons = 6 electrons 6 p+  =  6...
Calculating Numbers of Protons, Neutrons and Electrons.  10 Ne 20.179 Atomic Number   = 10 10 protons = 10electrons 10 p+ ...
3-2 Summary <ul><li>Name the subatomic particles. </li></ul><ul><ul><li>Protons, electrons, and neutrons are subatomic par...
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3-2 Structure Of An Atom

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3-2 Structure Of An Atom

  1. 1. Warm-up <ul><li>What charges are found in the atom? Where are those charges located? </li></ul><ul><ul><li>There are positive located in the nucleus. </li></ul></ul><ul><ul><li>There are negative located outside the nucleus. </li></ul></ul>
  2. 2. 3-2: The Structure of an Atom <ul><li>Objectives </li></ul><ul><ul><li>Identify three subatomic particles and compare their properties. </li></ul></ul><ul><ul><li>Distinguish the atomic number from mass number of an element and use these numbers to describe the structure of atoms. </li></ul></ul>
  3. 3. Properties of Subatomic Particles <ul><li>Proton, Neutron & Electron </li></ul><ul><li>Proton (p+) </li></ul><ul><ul><li>located inside nucleus </li></ul></ul><ul><ul><li>mass of 1 a.m.u. </li></ul></ul><ul><ul><ul><li>1.674 x 10 -24 g </li></ul></ul></ul><ul><ul><li>positive (+) charge </li></ul></ul>
  4. 4. <ul><li>Neutron (n o ) </li></ul><ul><li>-located inside nucleus </li></ul><ul><li>-mass of 1 a.m.u. </li></ul><ul><li>-no charge or neutral </li></ul><ul><li>Electron (e-) </li></ul><ul><li>-located outside nucleus in “cloud” </li></ul><ul><li>-mass of 0 a.m.u. </li></ul><ul><li>-a negative (-) charge </li></ul>
  5. 5. Comparing Elements <ul><li>Atomic Number (Z) </li></ul><ul><ul><li>the number of protons in one atom </li></ul></ul><ul><ul><li>All atoms are neutral so # p = # e- </li></ul></ul><ul><li>Atomic Mass (A) </li></ul><ul><ul><li>the number of protons and neutrons added together . </li></ul></ul><ul><ul><li>Neutrons = mass number – atomic number </li></ul></ul><ul><ul><li>n o = A - Z </li></ul></ul>
  6. 6. Calculating Numbers of Protons, Neutrons and Electrons. 6 C 12.011 Atomic Number = 6 6 protons = 6 electrons 6 p+ = 6 e- (atom is neutral) Mass Number = 12 12 Nucleus particles (p+ & n) -6 p+ 6 neutrons
  7. 7. Calculating Numbers of Protons, Neutrons and Electrons. 10 Ne 20.179 Atomic Number = 10 10 protons = 10electrons 10 p+ = 10 e- (atom is neutral) Mass Number = 20 20 Nucleus particles (p+ & n) -10 p+ 10 neutrons
  8. 8. 3-2 Summary <ul><li>Name the subatomic particles. </li></ul><ul><ul><li>Protons, electrons, and neutrons are subatomic particles. </li></ul></ul><ul><li>How can a student tell protons neutrons and electrons apart? </li></ul><ul><ul><li>Protons, electrons, and neutrons can be distinguished by mass, charge, and location in an atom. </li></ul></ul><ul><li>What is different about each element </li></ul><ul><ul><li>Atoms of different elements have different number of protons. </li></ul></ul><ul><li>What is unique about isotopes? </li></ul><ul><ul><li>Isotopes of an element have the same atomic number but different mass number because they have different numbers of neutrons. </li></ul></ul>

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