Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is...
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![Page 1: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/1.jpg)
Electrons
• Negative charge e-
• Located in the electron cloud far from the nucleus
• Have mass, but it is negligible
• Also have wave-like properties
![Page 2: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/2.jpg)
Bohr Model of the atom
• Bohr model: e- move in fixed orbits around the nucleus
![Page 3: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/3.jpg)
Wave-Mechanical Model of the atom
• Wave-mechanical model: e- move in areas called orbitals
• An orbital is a region where an e- is likely to be found
![Page 4: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/4.jpg)
Electrons have
ElectronS in their lowest possible energy state are in the
GROUND STATE
![Page 5: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/5.jpg)
ElectronS in a HIGHER possible energy state are in the
EXCITED STATE
![Page 6: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/6.jpg)
Ground State
Excited State
e-
![Page 7: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/7.jpg)
For an e- to jump from the ground state to the excited state, it must absorb energy (a photon of light)
When an e- falls back down from excited state to ground state,it releases energy (a photon of light)
![Page 8: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/8.jpg)
![Page 9: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/9.jpg)
![Page 10: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/10.jpg)
![Page 11: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/11.jpg)
Fluorescent and neon lights arecaused by excited e- returning
to ground state
![Page 12: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/12.jpg)
Ordinary light is seen by our eyes as a continuous spectrum
![Page 13: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/13.jpg)
The visible light produced by e- falling back to ground state is called a bright line spectrum
Light is emitted only at certain wavelengths
![Page 14: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/14.jpg)
Each element has its own distinct bright line spectrum
Bright line spectra can be used to identify elements,by comparing the spectral lines to known spectra
![Page 15: Electrons Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties.](https://reader036.fdocuments.net/reader036/viewer/2022070415/5697bf9e1a28abf838c94941/html5/thumbnails/15.jpg)