Answer:
number 4
Explanation:
The reflection of light involves the bouncing of it on the reflective surface. So, select the image at the bottom, labeled with number 4.
Answer:
Selenium atoms have 34 electrons and the shell structure is 2.8. 18.6. The ground state electron configuration of ground state gaseous neutral selenium is [Ar].
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Nothing, because copper has an extremely weak magnetic field. So if you were to perhaps take a magnet and place it next to a magnet, it wouldn't work. Since copper isn't magnetic.