Chemistry Exam 3
Terms
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- Wavelength of Cosmic Rays
- >10^-12m
-
Wavelength of Gamma Rays
and effect on motion of molecules -
10^-12 to 10^-11 m
Nuclear Transitions -
Wavelength of X Rays
and their affect on molecules type of transitions -
10^-11 to 10^-8m
break chemical bonds and ionize molecules
Electric Transitions -
Wavelength of UV Rays
and their affect on molecules -
10^-8m to 400nm
cause electrons to be promoted to higher energy levels
Electronic Transitions - Wavelength of Visible and their affect on molecules
-
400 to 800 nm
cause electrons to be promoted to higher energy levels - Wavelength of Infrared and their affect on molecules
-
800nm to 10^-3m
vibrations - Wavelength of Microwave and their affect on molecules
-
10^-3 to 10^-1
rotational motion - Wavelength of Radio and their effect on molecules
-
<10^-1
Spin Oreintation - Wavelength Frequency and Speed of Light
- Wavelength x Frequency= Speed of Light
- Energy Planck's Constant and Frequency
- E=hv
- Wavenumbers
- 1/Wavelength Usually in units of m^-1 or cm ^-1
-
Motion of Formaldehyde
and Cause -
1-3 Translation of entire molecule in the x,y,z direction
4-6 Rotation about the x,y,z axis
7. symmetric stretching
8. asymetric stretching
9. C-O streching
10. Symmetric Bending
11. Asymetic Bending
12. Out of Plane Bending
(Increasing Wavenumber)
Cause- IR and Microwaves - Vibrational Transitions
- Involve Rotational Transitions
- Electronic Transitions
- Involve Rotational Transitions and Vibrational Transition
- Possibility A of Excited Molecule When Energy is absorbed
- A-R1-IC-R2