Chapter 2: 2.1 Atomic Structure Flashcards
(64 cards)
Define:
Wavelength
The distance between two closest equivalent points of the wave
Define:
Frequency (in waves)
The number of oscillation cycles that occur at a fixed point in one second
What does the amplitude determine?
Amplitude determines the intensity
Value of Planck’s Constant
6.6260696 * 10^-34 J*s
How is the wave’s intensity obtained?
By squaring the amplitude of the wave
What are the wavelengths between 400-750 nm known as?
The visible spectrum/visible region
State the wavelengths of the visible spectrum
400-750 nm
How does the energy of light (photons) relate to wavelength?
Inverse relationship
(Longer wavelength = Lower energy, vice versa)
Unit for frequency
Hertz
True or False:
Energy of light can be absorbed or emitted only as small discrete portions
True
When a photon is emitted, the system _____ the energy
Loses
When a photon is gained, the system _____ the energy
Gains
What is happening when hydrogen atoms emit light?
The electron is emitting energy while falling back to ground state
What are the 3 series discovered during the research of the emission spectrum of atomic hydrogen?
Balmer Series (Visible)
Lyman Series (IR)
Paschen Series (UV)
Value of Rydberg Constant
10973731.6 / m
Ground state of Lyman emission series
n=1
Ground state of Balmer emission series
n=2
Ground state of Paschen emission series
n=3
What does m and n stand for in the Rydberg Formula?
m = Excited state
n = Ground state
True or False:
The electron does not have to return to ground state orbit
False, the electron has to return to lower energy orbit
What were the drawbacks of Bohr model?
- Doesn’t explain how the electron doesn’t fall into the nucleus
- Each line when enlarged is actually comprised of two very closely spaced lines
- Why are only certain orbits allowed?
- Didn’t work for atoms with more than one electron
Define:
Diffraction
Waves expanding to fill all space available (e.x. on other side of wall with a slit)
What is it called when waves interact with each other?
Interference
What is it known as when both waves interfere “in phase”?
Constructive interference