1 / 8

The Quantum Model of the Atom

The Quantum Model of the Atom. 4.2. Light and Electrons. Louis de Broglie suggested that e- in fixed orbitals (like Bohr suggested) behave with wave like properties. He hypothesized that electrons also have dual particle-wave nature. Electrons as waves.

giulia
Télécharger la présentation

The Quantum Model of the Atom

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Quantum Model of the Atom 4.2

  2. Light and Electrons • Louis de Broglie suggested that e- in fixed orbitals (like Bohr suggested) behave with wave like properties. • He hypothesized that electrons also have dual particle-wave nature.

  3. Electrons as waves • Can be diffracted – wave passes by the edge or through a small opening • Interference – waves pass over each other • Heisenberg uncertainty principle – it is impossible to determine simultaneously both the position and velocity of an e- or any other particle.

  4. Schrödinger • Schrödinger wave equation – probability of finding an electron in a certain orbital • Schrö and Heis = foundation for … • Quantum Theory – describes mathematically the wave properties of electrons and other very small particles.

  5. Quantum Numbers • Orbital – 3-d region around the nucleus that indicates the probable local of an e- • We can learn more than just what orbital e-s are in… • Quantum Numbers – specify the properties of atomic orbitals and the properties of e- in orbitals • Like seats at a concert

  6. Principal Quantum Number, n • PQN–the main E level occupied by the e- • n values are positive • As n increases so does the distance from the nucleus • Angular momentum quantum number, l – the shape of the orbital • Values can be 0 and any # lower than what n = (if n=3, l can be 0, 1, and 2)

  7. Magnetic Quantum Number, m • MQN = the orientation of the orbital around the nucleus • Values can be whole numbers, from -l, 0 to +l • If l = 2, m can be -2, -1, 0, 1, 2

  8. The Spin Quantum Number • SQN = has only 2 possible values (+1/2, -1/2) which indicate the two fundamental spin states of an electron in an orbital • A single orbital can hold a max of 2 electrons, but they must have opposite spin states.

More Related