PLEASE ANSWER: An iron nail is left outdoors as part of an investigation to study rust. How would you record data for this experiment? The nail goes from dull gray to a reddish color. What can you infer from this observation?

Imagine you are Dmitri Mendeleev giving a lecture about his periodic table. Write the part of speech that describes the characteristics of a column, or family of elements

i THINK its " the outside germs can attach to it"

Explanation:

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.