An electron from each atom feels the attraction from the other atom's nucleus. The attraction by the chlorine atoms is stronger than the attraction by the calcium atom. Two electrons are transferred ...

3rd Period: Sodium to argon—Electrons go into the third energy level. After the third energy level has 8 electrons, the next electron goes into the fourth level. 4th Period: Potassium and ...

The scientists determined the three-dimensional structure of the protein and found that there are positively charged calcium ions buried inside it, very near the place where the electrons are stored.

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