Electromagnetic radiation and quantum phenomena (AQA A-Level Physics): Flashcards

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Collisions of electrons with atoms
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Discrete energy levels in atoms

Fixed energy states electrons occupy; cannot exist between

Excitation (atomic physics)

Electron moves to higher energy level after gaining energy

Ionisation of an atom

Electron gains enough energy to completely leave the atom

Ionisation energy

Minimum energy required to remove electron from atom

Ground state (electron)

Original/lowest energy level of an electron

What is emitted when excited electron returns to ground state?

A photon

Electron volt (eVeV) definition

Energy gained by electron moving through p.d. of 11 V

Value of 11 eV in joules

1.6×10191.6 \times 10^{-19} J

Convert eV to J

Multiply by 1.6×10191.6 \times 10^{-19}

Convert J to eV

Divide by 1.6×10191.6 \times 10^{-19}

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