# Quantum Theory of An Atom

## Terms

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- N (orbital)
- 4 (orbital)
- M (orbital)
- 3 (orbital)
- F (subshell)
- 3 (subshell)
- Speed of Light Constant
- C= 3.00x 10^8 m/s
- Wave
- A continuously repeating change or oscilliation in matter or a physical field
- Diffraction
- a property of waves in which the waves spread out when they encounter an obstruction or small source through a hold
- enegy change equation
- Ei= Rh(1/nf^2- 1/ni^2)
- K (orbital)
- 1 (orbital)
- Transition between energy levels
- An electron in an atom can change energy only by going from one energy level to another energy level
- Energy of Photons equation
- E=hv
- Angular Momentum Quantum Number (L)
- This quantum number distinguishes orbitals of a given n having different shapes; it can have any integer value from 0 to n-1.
- Plancks constant
- h= 6.626 x 10^-34 J S
- principal quantum number (N)
- this quantum number is the one on which the energy of an electron in an atom principally depends; it can have an positive vaule: 1, 2, 3, and so on.
- Color of Shortest wavelength
- Blue Violet
- Photoelectric effect
- the ejection of electrons from the surface of a metal or from another material when light shines on it
- Wavelength
- lamda- the distance between any two adjacent identical points of a wave
- Line Spectrum
- a spectrum showing only certain colors or specific wavelengths of light
- Rydbergs constant
- 2.179 x 10 ^-18 J
- p (subshell)
- 1 (subshell)
- Uncertainty Principle
- A relation that states that the product of the uncertainty in position and the uncertainty in momentum of a particle can be no smaller then plans constant divided by 4 pi.
- Electromagnetic Radiation
- Visible light, x rays, and radio waves are all examples of this type of light
- Magnetic Quantum Number (ml)
- This quantum number distinguishes orbitals of given n and L- that is, of given energy and shape but having a different orientation in space; the allowed values are the integers from -L to + L.
- Electromagnetic Spectrum
- the range of frequencies or wavelengths of electromagnetic radiation
- Thomas Young
- showed that light, like waves, could be diffracted
- Wave- Particle Duality
- Wave and particle pictures of light should be regarded as complementary views of the same physical entity.
- D (subshell)
- 2 (subshell)
- Louis de Broglie
- Reasone that if light exhibits particle aspects, then perhaps particles of matter show characteristics of waves under the proper circumstances
- Max Planck's theoretical formula
- A formula that exactly describes the intensity of light of various frequencies emitted by a hot solid at different temperatures.
- Albert Einstein
- responsible for the discovering the photoelectric effect
- Spin Quantum Number (ms)
- This quantum number refers to the two possible orientations of the spin axis of an electron; possible values are +1/2 and -1/2.
- Quantum Mechanics
- Aka Wave mechanics the branch of physics that mathmatically describes the wave properties of of submicroscopic particles
- de Broglie Relation
- Lamda= h/ m(mass)v
- Energy level Postulate
- An atom itself can only have specific total energy values
- atomic orbital
- a wave function for an electron in an atom
- Energy levels
- specific energy values in an atom
- Continuous spectrum
- a spectrum containing light of all wavelengths
- S (subshell)
- 0 (subeshell)
- L (orbital)
- 2 (orbital)
- Speed of Light equation
- C= V Lamda
- G (subshell)
- 4 (subshell)
- Frequency
- (V) the number of wavelengths of that wave that pass a fixed point in one unit of time
- Isaac Newton
- believed that light consisted of a beam of particles
- Color of longest wavelength
- Red