I need this table filled out. 'In this project, you will create models of various atomic nuclei and how they change during radioactive decay, fission, or fusion. First, you will complete a table that summarizes how the structure of the nuclei
changes during each of these processes. This will help you plan your models.

its first and third is your answer i did the qustion the fourth isnt right

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.