# Unable to put a plus or minus symbol within a table

I'm making a table, but I cannot seem to get the plus/minus symbol appear within the table. It merely says \pm where I want the actual symbol to be.

I'm not sure what to do - I'd appreciate any help.

\documentclass[twoside]{article}

\usepackage{lipsum} % Package to generate dummy text throughout this template

\usepackage[T1]{fontenc} % Use 8-bit encoding that has 256 glyphs
\linespread{1.05} % Line spacing - Palatino needs more space between lines
\usepackage{microtype} % Slightly tweak font spacing for aesthetics

\usepackage[hmarginratio=1:1,top=32mm,columnsep=20pt]{geometry} % Document margins
\usepackage{multicol} % Used for the two-column layout of the document
\usepackage[hang, small,labelfont=bf,up,textfont=it,up]{caption} % Custom captions under/above floats in tables or figures
\usepackage{booktabs} % Horizontal rules in tables
\usepackage{float} % Required for tables and figures in the multi-column environment - they need to be placed in specific locations with the [H] (e.g. \begin{table}[H])
\usepackage{hyperref} % For hyperlinks in the PDF

\usepackage{lettrine} % The lettrine is the first enlarged letter at the beginning of the text
\usepackage{paralist} % Used for the compactitem environment which makes bullet points with less space between them
\usepackage{esvect}

\usepackage{abstract} % Allows abstract customization
\renewcommand{\abstractnamefont}{\normalfont\bfseries} % Set the "Abstract" text to bold
\renewcommand{\abstracttextfont}{\normalfont\small\itshape} % Set the abstract itself to small italic text

\usepackage{titlesec} % Allows customization of titles
\renewcommand\thesection{\Roman{section}} % Roman numerals for the sections
\renewcommand\thesubsection{\Roman{subsection}} % Roman numerals for subsections
\titleformat{\section}[block]{\large\scshape\centering}{\thesection.}{1em}{} % Change the look of the section titles
\titleformat{\subsection}[block]{\large}{\thesubsection.}{1em}{} % Change the look of the section titles

\pagestyle{fancy} % All pages have headers and footers
\fancyfoot{} % Blank out the default footer
\fancyhead[C]{CH 341: Biochemistry I $\bullet$ November 2015 $\bullet$ Vol. XXI, No. 1} % Custom header text
\fancyfoot[RO,LE]{\thepage} % Custom footer text
\usepackage{tabularx}
\usepackage{pgfplots}
\usepackage{caption}
\usepackage{graphicx} %allows importing images
\usepackage{float} % allows to control the float positions
\usepackage{mhchem}
\usepackage{textgreek}
\usepackage{siunitx}
\usepackage{textcomp}
\usepackage{multirow}
\usepackage{grffile}
\usepackage{placeins}

\begin{document}
\begin{table}
\small\caption{Product Concentrations and Enzyme Reaction Velocities for the 5 Substrate Concentrations in Varying Inhibitor Environments}
\begin{center}
\footnotesize
\begin{tabular}{ccc}
\toprule[1.5pt]
\midrule
\verb|Magnesium| & \verb|1.30 \pm 0.67| & \verb|25.97 \pm 13.33|\\
\verb|Zinc| & \verb|0.40 \pm 0.049| & \verb|8.06 \pm 0.97|\\
\bottomrule[1.5pt]
\end{tabular}
\end{center}
\end{table}

\end{document}

• You are using \verb, that won't work with \pm – user31729 Dec 6 '15 at 16:31
• Can you explain the usage of \verb? – egreg Dec 6 '15 at 16:43
• The usual way to say thank you is upvoting and accepting one of the answers here ;-) – user31729 Dec 9 '15 at 16:52
• Yes, sorry, it's been a hellish week! – ragzoxaim Dec 9 '15 at 16:55
• Sorry for being rude guys- thanks for the help. I've up voted the answers. – ragzoxaim Dec 9 '15 at 17:33

%      \verb|Zinc| & \verb|0.40 \pm 0.049| & \verb|8.06 \pm 0.97|\\
\bottomrule[1.5pt]
\end{tabular}
\end{center}
\end{table}

\end{document}


The usage of \verb is unclear; no formal table I know uses it.

In the following example I use siunitx, besides booktabs; the long header has been split across two lines in order to limit the table width.

\documentclass{article}
\usepackage{siunitx,booktabs}

\sisetup{separate-uncertainty}

\begin{document}

\begin{table}
\centering

\caption{Product Concentrations and Enzyme Reaction Velocities for the 5
Substrate Concentrations in Varying Inhibitor Environments}

\footnotesize
\normalfont\bfseries
\begin{tabular}{@{}c@{}}
#1
\end{tabular}%
}}

\begin{tabular}{
l
S[table-format=1.3(4)]
S[table-format=2.2(4)]
}
\toprule