How do u do this?
It is a BrainPOP worksheet.

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

What material did the moon come from?

Collin would like to use the data a coworker has entered in a database. the problem is the coworker's database software is different from collin's. collin should