Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical ...

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Chemical compounds are molecules made of atoms of different elements, while mixtures contain atoms of different elements not necessarily combined as molecules.

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Chemistry is centrally concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds.

The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ...

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A chiral molecule or ion exists in two stereoisomers that are mirror images of each other, called enantiomers; they are often distinguished as either "right- ...

Contents · How to write crystal water in the chem template · Split x-ray diffraction from x-ray crystallography · Definitions of chemical element · Class of DNA/RNA ...

A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. When chemical reactions occur, ...

Chemical equation · Nuclear chemistry · Instability · Reaction models

The discoveries of the 118 chemical elements known to exist as of 2024 are presented here in chronological order. The elements are listed generally in the ...