Understanding Electromagnetic Radiation: A
Comprehensive Chemistry Guide 2025/2026
NOTES
Electromagnetic Radiation - ✔✔✔Energy that travels in streams of photons that travel through
space. ex) Microwaves, light, radiowaves
EMR - ✔✔✔low enrgy - R O Y G B (I) V - high energy
Parts of Wave - ✔✔✔Crest = Top
Trough = Bottom
Amplitude = Middle -> Top
Wavelength = Crest to Crest (upside down Y)
Frequency = V (with tail)
Speed = C
V= C/(upside down Y)
Bright Line Spectra - ✔✔✔Breakdown of light into its compenent colors
Rutherford's Atom - ✔✔✔Majority of the Atom is empty space, with a very dense nucleus.
Shot atoms at a gold plate and most went through but a few bounced back showing that most of
the atom was space, but there was a dense nucleus that sometimes came in contact with the
gold plate.
Photon - ✔✔✔Bundle of Light energy
How do Atoms emit Light? - ✔✔✔Energy is given to an electron and it jumps to an outer shell.
When the electron returns home to its original shell, it releases the energy and emits light.
Comprehensive Chemistry Guide 2025/2026
NOTES
Electromagnetic Radiation - ✔✔✔Energy that travels in streams of photons that travel through
space. ex) Microwaves, light, radiowaves
EMR - ✔✔✔low enrgy - R O Y G B (I) V - high energy
Parts of Wave - ✔✔✔Crest = Top
Trough = Bottom
Amplitude = Middle -> Top
Wavelength = Crest to Crest (upside down Y)
Frequency = V (with tail)
Speed = C
V= C/(upside down Y)
Bright Line Spectra - ✔✔✔Breakdown of light into its compenent colors
Rutherford's Atom - ✔✔✔Majority of the Atom is empty space, with a very dense nucleus.
Shot atoms at a gold plate and most went through but a few bounced back showing that most of
the atom was space, but there was a dense nucleus that sometimes came in contact with the
gold plate.
Photon - ✔✔✔Bundle of Light energy
How do Atoms emit Light? - ✔✔✔Energy is given to an electron and it jumps to an outer shell.
When the electron returns home to its original shell, it releases the energy and emits light.
