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# Atomic Radii and Electron Configurations

CHEM-DKFT5X

Which of the following electron configurations represent the LARGEST neutral atom and the SMALLEST neutral atom?

A

${ 1s }^{ 2 }{ 2s }^{ 2 }{ 2p }^{ 6 }{ 3s }^{ 2 }{ 3p }^{ 6 }{ 4s }^{ 1}$ and ${ 1s }^{ 2 }{ 2s }^{ 2 }{ 2p }^{ 6 }{ 3s }^{ 2 }{ 3p }^{ 6 }$

B

${ 1s }^{ 2 }{ 2s }^{ 2 }{ 2p }^{ 6 }{ 3s }^{ 2 }{ 3p }^{ 6 }{ 4s }^{ 2}$ and ${ 1s }^{ 2 }{ 2s }^{ 2 }{ 2p }^{ 6 }{ 3s }^{ 2 }{ 3p }^{ 6 }{ 4s }^{ 2}{ 3d }^{ 10}{ 3p }^{ 6}$

C

${ 1s }^{ 2 }{ 2s }^{ 2 }{ 2p }^{ 6 }{ 3s }^{ 2 }$ and ${ 1s }^{ 2 }{ 2s }^{ 2 }{ 2p }^{ 6 }{ 3s }^{ 2 }{ 3p }^{ 3 }$

D

${ 1s }^{ 2 }{ 2s }^{ 2 }$ and ${ 1s }^{ 2 }{ 2s }^{ 2 }{ 2p }^{ 5 }$