\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{jryn17 (jryn17)}
\pdfinfo{
  /Title (ap-chemistry-periodic-table-and-common-ions.pdf)
  /Creator (Cheatography)
  /Author (jryn17 (jryn17))
  /Subject (AP Chemistry Periodic Table and Common Ions Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{25E7F5}
\definecolor{LightBackground}{HTML}{E3FCFD}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{AP Chemistry Periodic Table and Common Ions Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{jryn17 (jryn17)} via \textcolor{DarkBackground}{\uline{cheatography.com/41902/cs/12654/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}jryn17 (jryn17) \\
  \uline{cheatography.com/jryn17} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 29th August, 2017.\\
   Updated 30th August, 2017.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{x{4.08114 cm} p{0.89586 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Group 1}}  \tn
% Row 0
\SetRowColor{LightBackground}
Hydrogen & H \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Lithium & Li \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Sodium & Na \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Potassium & K \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Rubidium & Rb \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
Cesium & Cs \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
Francium & Fr \tn 
% Row Count 7 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{4.08114 cm} p{0.89586 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Group 2}}  \tn
% Row 0
\SetRowColor{LightBackground}
Beryllium & Be \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Magnesium & Mg \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Calcium & Ca \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Strontium & Sr \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Barium & Ba \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
Radium & Ra \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.9816 cm} p{0.9954 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Group 13}}  \tn
% Row 0
\SetRowColor{LightBackground}
Boron & B \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Aluminum & Al \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Gallium & Ga \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Indium & In \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Titanium & Ti \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{4.08114 cm} p{0.89586 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Group 14}}  \tn
% Row 0
\SetRowColor{LightBackground}
Carbon & C \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Silicon & Si \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Germanium & Ge \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Tin & Sn \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Lead & Pb \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{4.23045 cm} p{0.74655 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Group 15}}  \tn
% Row 0
\SetRowColor{LightBackground}
Nitrogen & N \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Phosphorous & P \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Arsenic & As \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Antimony & Sb \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Bismuth & Bi \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{4.08114 cm} p{0.89586 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Group 16}}  \tn
% Row 0
\SetRowColor{LightBackground}
Oxygen & O \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Sulfur & S \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Selenium & Se \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Tellurium & Te \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Polonium & Po \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.9816 cm} p{0.9954 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Group 17}}  \tn
% Row 0
\SetRowColor{LightBackground}
Fluorine & F \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Chlorine & Cl \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Bromine & Br \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Iodine & I \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Astatine & At \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.88206 cm} p{1.09494 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Group 18}}  \tn
% Row 0
\SetRowColor{LightBackground}
Helium & He \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Neon & Ne \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Argon & Ar \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Krypton & Kr \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Xenon & Xe \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
Radon & Rn \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.08574 cm} x{1.89126 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{1+}}  \tn
% Row 0
\SetRowColor{LightBackground}
Ammonium & NH4\textasciicircum{}+\textasciicircum{} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Copper(I) & Cu\textasciicircum{}+\textasciicircum{} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Hydrogen/Hydronium & H\textasciicircum{}+\textasciicircum{},H3O\textasciicircum{}+\textasciicircum{} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Lithium & Li\textasciicircum{}+\textasciicircum{} \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Potassium & K\textasciicircum{}+\textasciicircum{} \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
Silver & Ag\textasciicircum{}+\textasciicircum{} \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
Sodium & Na\textasciicircum{}+\textasciicircum{} \tn 
% Row Count 7 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.38436 cm} p{1.59264 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{2+}}  \tn
% Row 0
\SetRowColor{LightBackground}
Barium & Ba\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Cadmium & Cd\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Calcium & Ca\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Cobalt & Co\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Chromium(II) & Cr\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
Copper(II) & Cu\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
Iron(II) & Fe\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
Lead(II) & Pb\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 8 (+ 1)
% Row 8
\SetRowColor{LightBackground}
Magensium & Mg\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 9 (+ 1)
% Row 9
\SetRowColor{white}
Manganese(II) & Mn\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 10 (+ 1)
% Row 10
\SetRowColor{LightBackground}
Mercury(I) & Hg\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 11 (+ 1)
% Row 11
\SetRowColor{white}
Mercury(II) & Hg\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 12 (+ 1)
% Row 12
\SetRowColor{LightBackground}
Nickel & Ni\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 13 (+ 1)
% Row 13
\SetRowColor{white}
Strontium & Sr\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 14 (+ 1)
% Row 14
\SetRowColor{LightBackground}
Tin(II) & Sn\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 15 (+ 1)
% Row 15
\SetRowColor{white}
Zinc & Zn\textasciicircum{}2+\textasciicircum{} \tn 
% Row Count 16 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.38436 cm} p{1.59264 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{3+}}  \tn
% Row 0
\SetRowColor{LightBackground}
Aluminum & Al\textasciicircum{}3+\textasciicircum{} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Chromium(III) & Cr\textasciicircum{}3+\textasciicircum{} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Iron(III) & Fe\textasciicircum{}3+\textasciicircum{} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Scandium & Sc\textasciicircum{}3+\textasciicircum{} \tn 
% Row Count 4 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.68758 cm} p{2.28942 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{4+}}  \tn
% Row 0
\SetRowColor{LightBackground}
Tin(IV) & Sn\textasciicircum{}4+\textasciicircum{} \tn 
% Row Count 1 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.88206 cm} x{1.09494 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{1-}}  \tn
% Row 0
\SetRowColor{LightBackground}
Acetate & C2H3O2\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Bromide & Br\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Hydrogen Carbonate (Bicarbonate) & HCO3\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
Chlorate & ClO3\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Chlorite & ClO2\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 7 (+ 1)
% Row 5
\SetRowColor{white}
Chloride & Cl\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 8 (+ 1)
% Row 6
\SetRowColor{LightBackground}
Flouride & F\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 9 (+ 1)
% Row 7
\SetRowColor{white}
Hydride & H\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 10 (+ 1)
% Row 8
\SetRowColor{LightBackground}
Hydroxide & OH\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 11 (+ 1)
% Row 9
\SetRowColor{white}
Hypochlorite & ClO\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 12 (+ 1)
% Row 10
\SetRowColor{LightBackground}
Iodide & I\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 13 (+ 1)
% Row 11
\SetRowColor{white}
Nitrate & NO3\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 14 (+ 1)
% Row 12
\SetRowColor{LightBackground}
Nitrite & NO2\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 15 (+ 1)
% Row 13
\SetRowColor{white}
Perchlorate & ClO4\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 16 (+ 1)
% Row 14
\SetRowColor{LightBackground}
Permanganate & MnO4\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 17 (+ 1)
% Row 15
\SetRowColor{white}
Dihydrogen Phosphate & H2PO4\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 18 (+ 1)
% Row 16
\SetRowColor{LightBackground}
Hydrogen Sulfate (Bisulfate) & HSO4\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 19 (+ 1)
% Row 17
\SetRowColor{white}
Hydrogen Sulfite (Bisulfite) & HSO3\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 20 (+ 1)
% Row 18
\SetRowColor{LightBackground}
Hydrogen Sulfide (Bisulfide & HS\textasciicircum{}-\textasciicircum{} \tn 
% Row Count 21 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.53367 cm} x{1.44333 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{2-}}  \tn
% Row 0
\SetRowColor{LightBackground}
Carbonate & CO3\textasciicircum{}2-\textasciicircum{} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Chromate & CrO4\textasciicircum{}2-\textasciicircum{} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
DiChromate & Cr2O7\textasciicircum{}2-\textasciicircum{} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Oxalate & C2O4\textasciicircum{}2-\textasciicircum{} \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Monohydrogen Phosphate & HPO4\textasciicircum{}2-\textasciicircum{} \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
Sulfate & SO4\textasciicircum{}2-\textasciicircum{} \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
Sulfite & SO3\textasciicircum{}2-\textasciicircum{} \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
Sulfide & S\textasciicircum{}2-\textasciicircum{} \tn 
% Row Count 8 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.78712 cm} x{2.18988 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{3-}}  \tn
% Row 0
\SetRowColor{LightBackground}
Phosphate & PO4\textasciicircum{}3-\textasciicircum{} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Phosphite & PO3\textasciicircum{}3-\textasciicircum{} \tn 
% Row Count 2 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}