1 / 14

II. Bohr Model of the Atom (p. 94 - 97)

Ch. 4 - Electrons in Atoms. II. Bohr Model of the Atom (p. 94 - 97). Bohr's Atom: Quantum Behavior in Hydrogen Concept Simulation - reenacts electron's 'jump' and 'fall' to precise energy levels in a hydrogen atom. Visionlearning Viewer. A. Line-Emission Spectrum. Hydrogen Gas.

johnbaird
Download Presentation

II. Bohr Model of the Atom (p. 94 - 97)

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. Ch. 4 - Electrons in Atoms II. Bohr Model of the Atom(p. 94 - 97) C. Johannesson

  2. C. Johannesson

  3. Bohr's Atom: Quantum Behavior in Hydrogen • Concept Simulation - reenacts electron's 'jump' and 'fall' to precise energy levels in a hydrogen atom. Visionlearning Viewer C. Johannesson

  4. A. Line-Emission Spectrum Hydrogen Gas excited state ENERGY IN PHOTON OUT ground state Atoms are “excited” with an electric current C. Johannesson

  5. B. Bohr Model • e- exist only in orbits with specific amounts of energy called energy levels • Therefore… • e- can only gain or lose certain amounts of energy • only certain photons are produced C. Johannesson

  6. Energy of photon depends on the difference in energy levels Bohr’s calculated energies matched the IR, visible, and UV lines for the H atom B. Bohr Model 6 5 4 3 2 1 C. Johannesson

  7. C. Other Elements • Each element has a unique bright-line emission spectrum. • “Atomic Fingerprint” Helium Bohr’s calculations only worked for hydrogen!  C. Johannesson

  8. According to the Bohr model of the atom, which particles are allowed to exist in any one of a number of energy levels? a) Electronsb) Protonsc) Neutronsd) Both (b) and (c) C. Johannesson

  9. The line-emission spectrum of an atom is caused by the energies released when electrons a) “jump” from a lower energy level to a higher energy levelb) “jump” from a higher energy level to a lower energy levelc) “jump” from the ground state to an excited stated) None of the above C. Johannesson

  10. Because excited hydrogen atoms always produce the same line-emission spectum, scientists concluded that hydrogen a) has no electronsb) does not release energyc) releases energy of only certain valuesd) can exist only in the ground state C. Johannesson

  11. Bohr’s model correctly explains the spectra of atoms with how many electron(s)? a) oneb) twoc) threed) four or more C. Johannesson

  12. The process of an atom releasing energy when it moves to a lower energy state is called a) absorptionb) emissionc) translationd) regression C. Johannesson

  13. In the Bohr model of the atom, in which orbit is an electron in its lowest energy state? a) In the orbit closest to the nucleusb) In the orbit farthest from the nucleusc) in the electron cloudd) midway between two orbits C. Johannesson

  14. Flame test online lab!!!! • http://www.800mainstreet.com/spect/emission-flame-exp.html • http://www.800mainstreet.com/spect/emission-flame-exp.html C. Johannesson

More Related