If an atom gains electrons, their number becomes greater than the number of protons, and the atom is negatively charged. ... If sodium loses one electron, it is a positive atom and is written as Na+. ... Most periodic tables include many physical properties of the elements. ... As the energy levels continue to increase, so does the maximum number of electrons. ... It has the following electron configuration: shell #1 has 2 electrons, shell #2 has 8 electrons, and shell #3 has 5 electrons.
|Title||:||Anatomy and Physiology in Focus|
|Author||:||Stephen G. Davenport|