Facts about Electrons

1. 07

   Paired electrons with opposite spins occupying the same orbital demonstrate the Pauli exclusion principle, discovered by Wolfgang Pauli in 1925, preventing identical quantum states.

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2. 06

   When accelerated through a potential difference of one volt, electrons gain kinetic energy equal to one electron-volt, a unit of measurement equal to 1.602 × 10^-19 joules.

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3. 05

   In a vacuum, an isolated electron cannot emit or absorb light because doing so would violate conservation of energy and momentum simultaneously, a principle known as the no-go theorem.

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4. 04

   Orbital electrons surrounding atomic nuclei occupy distinct energy levels described by quantum numbers, with the first shell holding maximum 2 electrons and subsequent shells following the formula 2n².

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5. 03

   Spinning at speeds up to 137,000 kilometers per second, electrons possess an intrinsic angular momentum property called spin that has no classical mechanical equivalent.

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6. 02

   At approximately 1/1836th the mass of a proton, electrons are about 2,000 times lighter than the nucleons that comprise atomic nuclei.

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7. 01

   The smallest unit of electric charge, discovered by J.J. Thomson in 1897, is carried by electrons at approximately 1.602 × 10^-19 coulombs.

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