Science - 2018-19

CH.2 g, i - Electrons in the Atom

The student will investigate and understand that the placement of elements on the periodic table is a function of their atomic structure. The periodic table is a tool used for the investigations of:
g) electron configurations, valence electrons, and oxidation numbers;
i) historical and quantum models.

Bloom's Levels:  Analyze; Understand

Adopted: 2010

BIG IDEAS

  • The structure of an atom determines its properties.
  • Atoms are composed of smaller particles.

  • I can explain why some reactions are explosive.
  • I can communicate how the model of the atom has changed over time.
  • UNDERSTANDING THE STANDARD

    In order to meet this standard, it is expected that students will

    g) relate the position of an element on the periodic table to its electron configuration.

         determine the number of valence electrons and possible oxidation numbers from an element’s electron configuration.

         write the electron configuration for the first 20 elements of the periodic table.

    i) identify key contributions of principal scientists including:

    •      atomos, initial idea of atom – Democritus
    •      first atomic theory of matter, solid sphere model – John Dalton
    •      discovery of the electron using the cathode ray tube experiment, plum pudding model – J. J. Thomson
    •      discovery of the nucleus using the gold foil experiment, nuclear model – Ernest Rutherford
    •      discovery of charge of electron using the oil drop experiment – Robert Millikan
    •      energy levels, planetary model – Niels Bohr
    •      periodic table arranged by atomic mass – Dmitri Mendeleev
    •      periodic table arranged by atomic number – Henry Moseley
    •      quantum nature of energy – Max Planck
    •      uncertainty principle, quantum mechanical model – Werner Heisenberg
    •      wave theory, quantum mechanical model – Louis de Broglie.
    •      differentiate between the historical and quantum models of the atom.

    ESSENTIALS

    In order to meet this standard, it is expected that students will

    g)  relate the position of an element on the periodic table to its electron configuration.

    determine the number of valence electrons and possible oxidation numbers from an element’s electron configuration.

    write the electron configuration for the first 20 elements of the periodic table.

    i)  identify key contributions of principal scientists including:

         -atomos, initial idea of atom – Democritus

         -first atomic theory of matter, solid sphere model – John Dalton

         -discovery of the electron using the cathode ray tube experiment, plum pudding model – J. J. Thomson

         -discovery of the nucleus using the gold foil experiment, nuclear model – Ernest Rutherford

         -discovery of charge of electron using the oil drop experiment – Robert Millikan

         -energy levels, planetary model – Niels Bohr

         -periodic table arranged by atomic mass – Dmitri Mendeleev

         -periodic table arranged by atomic number – Henry Moseley

         -quantum nature of energy – Max Planck

         -uncertainty principle, quantum mechanical model – Werner Heisenberg

         -wave theory, quantum mechanical model – Louis de Broglie.

         -differentiate between the historical and quantum models of the atom.


    KEY VOCABULARY

    atomic orbital, atomic emission spectrum, Aufbau principle, electron configuration, electron-dot structure, energy sublevel, ground state, Heisenberg uncertainty principle, Hund's rule, Pauli exclusion pricniple, photoelectric effect, photon, principal energy level, principal quantum number, valence electron

    Updated: Dec 01, 2017