(a) Neon (Ne) has two shells in which both are completely filled with electrons.
(b) Magnesium (Mg) has the electronic configuration 2, 8, 2.
(c) Silicon (Si) has a total of three shells, with four electrons in its valence shell
(d) Boron (B) a total of two shells, with three electrons in its valence shell
(e) Carbon (C) has twice as many electrons in its second shell as in its first shell