Lesson 5

Period 3 
Elements
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Slide 1: Diapositive
states of matterMiddelbare schoolhavo, vwoLeerjaar 1

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Period 3 
Elements

Slide 1 - Diapositive

This lesson
  •  Recap
  • 4.3 The evolution of our understanding of the atom
  • Working independently

Slide 2 - Diapositive

Learning goals
  • Describe the Dalton model, the Thomson model, the Rutherford model and the Bohr model
  •  Explain how the Rutherford experiment shows that the Thomson model is not correct
  •  Describe the key features of the Bohr model

Slide 3 - Diapositive

Class rules
  • We sit according to the class plan..

  • Class mode — You pay attention to the teacher, one person talks.

  • Working mode — Working independently, talking quietly.

  • No shouting, talking, joking or gesturing to the other side of the class.

  • Disturb the class, you go outside.




Slide 4 - Diapositive

Atoms — What have we learned?

Slide 5 - Diapositive

Atom
  • Comes from atomos.
  • Atomos means indivisible .
  • Atoms are the building blocks of reality.
  •  There are many types of atoms (elements).
  • All atoms of the same element have the same size and mass.

Slide 6 - Diapositive

Slide 7 - Diapositive

The evolution of our understanding of the atom

Slide 8 - Diapositive

What are the four theories that describe atoms called?

Slide 9 - Diapositive

Dalton — Thomson — Rutherford — Bohr 

Slide 10 - Diapositive

Dalton
  • Everything is made up out fundamental building blocks: Atoms
  • Atoms are indivisible (cannot be split in two)
  • There are many types of atoms (elements)
  • Atoms of the same elements have the same mass

Slide 11 - Diapositive

Thomson
Plum pudding model

Slide 12 - Diapositive

Thomson
Plum pudding model
  • A blob of positive and negative charges

Slide 13 - Diapositive

The Rutherford experiment

Slide 14 - Diapositive

Slide 15 - Vidéo

Rutherford model

Slide 16 - Diapositive

Rutherford model
An atom is
  • A nucleus containing protons and neutrons
  • With a cloud of electrons around it 

Slide 17 - Diapositive

The Bohr model

Slide 18 - Diapositive

The Bohr model
  • An atom has a nucleus — made up out of protons and Neutrons
  • Electrons orbit around the nucleus in fixed orbits



      Slide 19 - Diapositive

      The Bohr model
      • An atom has a nucleus — made up out of protons and Neutrons
      • Electrons orbit around the nucleus in fixed orbits

      So an atom is made up out of:



        Slide 20 - Diapositive

        The Bohr model
        • An atom has a nucleus — made up out of protons and Neutrons
        • Electrons orbit around the nucleus in fixed orbits

        So an atom is made up out of:

        • Protons (positive charge)


          Slide 21 - Diapositive

          The Bohr model
          • An atom has a nucleus — made up out of protons and Neutrons
          • Electrons orbit around the nucleus in fixed orbits

          So an atom is made up out of:

          • Protons (positive charge)
          • Neutrons (neutral charge)


            Slide 22 - Diapositive

            The Bohr model
            • An atom has a nucleus — made up out of protons and Neutrons
            • Electrons orbit around the nucleus in fixed orbits

            So an atom is made up out of:

            • Protons (positive charge)
            • Neutrons (neutral charge)
            • Electrons (negative charge)

              Slide 23 - Diapositive

              The Bohr model

              Slide 24 - Diapositive

              After the Bohr model?

              Slide 25 - Diapositive

              Charge cloud model

              Slide 26 - Diapositive

              Slide 27 - Diapositive

              Working independently

              Slide 28 - Diapositive

              Learning goals
              • Describe the Dalton model, the Thomson model, the Rutherford model and the Bohr model
              •  Explain how the Rutherford experiment shows that the Thomson model is not correct
              •  Describe the key features of the Bohr model

              Slide 29 - Diapositive

              Slide 30 - Vidéo