Reference Groups: A reference group is any group of people that individuals use as a standard for evaluating themselves and their own behavior (Schaefer). The term reference group was coined by Herbert Hymen in 1942 in a study of social class.
Fill in the orbitals according to the number of electrons in your atom. For instance, if we want to write an electron configuration for an uncharged calcium atom, we'll begin by finding its atomic number on the periodic table.
Count Electrons Lewis electron dot structures show the valence electrons for each atom. You don't need to worry about the total number of electrons, only those in the outer shells. The octet rule states that atoms with 8 electrons in their outer shell are stable.