Chemistry Liquids MDCAT 2010
PMDC Verified Question 72 of 73
Metallic conduction involves the relatively free movement of their------------------- throughout the metallic lattice:
A
Atoms
B
Electrons
C
Ions
D
Molecules
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Electrons
Concept:

According to the Electron Sea Model of metallic bonding, metals consist of a lattice of positive ions surrounded by a "sea" of delocalized valence electrons.

Formula:

Not applicable.

Solution:

  • Metals have low ionization energies, so their valence electrons are easily detached from individual atoms.


  • These delocalized electrons are highly mobile and free to move throughout the entire metallic lattice.


  • When an electrical potential is applied, these free electrons drift, facilitating metallic electrical and thermal conduction.


Why other options are incorrect:

Atoms and positive ions remain relatively fixed in their lattice positions (they only vibrate). Molecules do not exist in standard metallic lattices.

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