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Chemistry 1 > Test 4- Quantum Mechanics > Flashcards

Test 4- Quantum Mechanics Flashcards

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1
Q

Electromagnetic Radiation

A
  • The radiation associated with an electric and magnetic field; it varies periodically and travels at the speed of light
  • Form of energy that exhibits wavelike behaviors as it travel through space
  • Visible light is part of the electromagnetic spectrum
  • Visible light is a type of electromagnetic radiation
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2
Q

Wavelength

A
  • λ

- The distance corresponding points on an adjacent waves

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3
Q

Frequency

A
  • ν

- The number of waves that pass a given point in a specific time, usually one second

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4
Q

Speed of light equation

A
  • C=λν

- Speed of light= wavelength times frequency

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5
Q

Speed of light number

A

3.00 x 10^8 ms^-1 or 3.00 x 10^8 m/s

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6
Q

Wavelength is measured in

A

meters

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7
Q

Frequency is measured in

A
  • s^-1
  • One wave per second is called a hertz
  • Therefore s^-1 is a hertz
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8
Q

The Photoelectric effect

A
  • The photoelectric effect is when electrons are emitted from a metal when light shines on the metal
  • Only certain wavelengths od electromagnetic radiation (light) will cause an electron to be emitted
  • Only certain frequencies or wavelength of e.m. (light) will cause an electron to be emitted
  • Max Planck proposed that light travelled in little units/packets of energy called quanta
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9
Q

Quantum

A

the minimum quantity of energy that can be lost or gained from an atom

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10
Q

Photon

A
  • Einstein called the particles that carried these packets of electromagnetic radiation photons
  • A photon is a particle of electromagnetic radiation having zero mass and carrying a quantum of energy
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11
Q

Energy in relation to frequency

A
  • E=hv
  • Energy= Plancks constant times frequency
  • h=Plancks constant=6.626 x 10^-34 Js
  • Gamma has a higher energy because it has a higher frequency
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12
Q

Spectroscopy

A
  • The branch of science concerned with the investigation and measurement of spectra produced when matter interacts with or emits electromagnetic radiation
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13
Q

Continuous spectra

A

continuous range of frequencies of electromagnetic radiation

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14
Q

Line Spectra

A

a spectrum consisting of discrete frequencies of electromagnetic radiation

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15
Q

Emission Spectra

A
  • Aka Bright line spectrum

- results from electrons losing energy when they move an excited state to the ground state

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16
Q

Absorption Spectra

A
  • Aka dark line spectrum

- results when electrons absorb energy to move from ground to excited state

17
Q

Emission and absorption

A

compliment each other

Chemistry 1 (17 decks)

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