Sodium is a metal that explodes in water, while chlorine is a poisonous gas. When combined, however, they make edible table salt. Why? Group of answer choices

1) When atoms bond they undergo a chemical change, which changes their physical properties.

2) Two negatives make a positive

3) Salt is actually still poisonous, because of the chlorine in it.

4) The sodium and the chlorine have undergone a physical change, into a solid. The solid part is edible.

Option B

Explanation:

While adding salts to water is a pretty safe chemical reaction, in its elemental state, each component can be highly reactive. Sodium and chlorine both react violently with water, but are stable when their ions are together in a salt.

i do not get it   at all

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.