How many total electrons are in the Pb^4+ ion?
A. 82
B.86
C.78

Explanation:

Lead (Pb) has 82 protons, or positively charged particles. If this was a neutral atom of lead, then there would also be 82 electrons, or negatively charge particles to balance each other out and create an overall charge of 0.

However, we are given an ion of lead (Pb⁴⁺) which means the electrons and protons are not equal.

This is a 4+ ion. Since it is more positive, there must be fewer electrons than protons. In this case, it is 4 fewer electrons.

There must be 78 electrons.

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 answer is option a.