Bonded electrons are attracted by two nuclei, which causes them to have ---Select--- electron domains than nonbonding electrons, which are only attracted by one nucleus. The ---Select--- nonbonding electron domains could therefore crowd and compress the ---Select--- bonded domains. This compression can result in a molecule with ---Select--- bond angles than those predicted by the VSEPR model.

Explanation is in the file

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metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

the awnser is group 12