bmsR9x
Written on June 24, 2019
% Dans le préambule
% -----------------
\usepackage{chemfig}
% -----------------
\chemfig{ \lewis{0.,X}}
\chemfig{ \lewis{1.,X}}
\chemfig{ \lewis{2,X}}
\chemfig{ \lewis{3:,X}}
\chemfig{ \lewis{4:,X}}
\chemfig{ \lewis{024,X}}