What is the smallest sub atomic particle that orbit around the nucleus?

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

If the new moon happens on january 15th, what shape will it be on february 6th?

What is an electric motor? explain its operation. 2-3 sentence