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\usepackage{amsmath}
\usepackage{chemfig}
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% Document information
\title{Chemistry Vocabulary}
\author{}
\date{\today}

\begin{document}

\maketitle

\section{Introduction}

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\section{Elements and elementary substances}

\section{Acids and bases}

\section{Ions}

\section{Ores and alloys}

\section{Reactions}

\section{Hydrocarbons and their Halogen derivatives}

\section{Alicyclic compounds and aromatic compounds}

\section{Alcohol, phenols, ketones and aldehyde}

\section{Carboxylic acids and esters}

\section{Amines, amides and nitriles}

\section{Thiols and thioethers}

\section{Macromolecule}

\section{Plastics}

\section{Organic compounds in everyday life}

\end{document}