Rust, or iron oxide, . Group of answer choices

A is the result of rainwater and oxygen combining with iron

B leaves dark streaks across rocks

C is formed by chemical erosion

D All of the above.

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

Most of the volume of an atom is occupied by the

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two